999997874844049 has 3 divisors (see below), whose sum is σ = 999997906466793. Its totient is φ = 999997843221306.

The previous prime is 999997874843977. The next prime is 999997874844107. The reversal of 999997874844049 is 940448478799999.

The square root of 999997874844049 is 31622743.

It is a perfect power (a square), and thus also a powerful number.

999997874844049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 999997874844049 - 2⁷ = 999997874843921 is a prime.

It is a super-2 number, since 2×999997874844049² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999997874845049) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 15811372 + ... + 47434114.

It is an arithmetic number, because the mean of its divisors is an integer number (333332635488931).

Almost surely, 2^{999997874844049} is an apocalyptic number.

999997874844049 is the 31622743-rd square number.

999997874844049 is the 15811372-nd centered octagonal number.

It is an amenable number.

999997874844049 is a deficient number, since it is larger than the sum of its proper divisors (31622744).

999997874844049 is an frugal number, since it uses more digits than its factorization.

999997874844049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63245486 (or 31622743 counting only the distinct ones).

The product of its (nonzero) digits is 426649337856, while the sum is 100.

The spelling of 999997874844049 in words is "nine hundred ninety-nine trillion, nine hundred ninety-seven billion, eight hundred seventy-four million, eight hundred forty-four thousand, forty-nine".