992868641 has 4 divisors (see below), whose sum is σ = 992949552. Its totient is φ = 992787732.

The previous prime is 992868599. The next prime is 992868647. The reversal of 992868641 is 146868299.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 146868299 = 419 ⋅350521.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-992868641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (992868647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17831 + ... + 47996.

It is an arithmetic number, because the mean of its divisors is an integer number (248237388).

Almost surely, 2^992868641 is an apocalyptic number.

It is an amenable number.

992868641 is a deficient number, since it is larger than the sum of its proper divisors (80911).

992868641 is a wasteful number, since it uses less digits than its factorization.

992868641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80910.

The product of its digits is 1492992, while the sum is 53.

The square root of 992868641 is about 31509.8181683107. The cubic root of 992868641 is about 997.6172071411.

The spelling of 992868641 in words is "nine hundred ninety-two million, eight hundred sixty-eight thousand, six hundred forty-one".