698996547409 has 4 divisors (see below), whose sum is σ = 723099876660. Its totient is φ = 674893218160.

The previous prime is 698996547401. The next prime is 698996547419. The reversal of 698996547409 is 904745699896.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 571729552384 + 127266995025 = 756128^2 + 356745^2 .

It is a cyclic number.

It is not a de Polignac number, because 698996547409 - 2³ = 698996547401 is a prime.

It is a super-2 number, since 2×698996547409² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (698996547401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12051664582 + ... + 12051664639.

It is an arithmetic number, because the mean of its divisors is an integer number (180774969165).

Almost surely, 2^698996547409 is an apocalyptic number.

It is an amenable number.

698996547409 is a deficient number, since it is larger than the sum of its proper divisors (24103329251).

698996547409 is a wasteful number, since it uses less digits than its factorization.

698996547409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24103329250.

The product of its (nonzero) digits is 1058158080, while the sum is 76.

The spelling of 698996547409 in words is "six hundred ninety-eight billion, nine hundred ninety-six million, five hundred forty-seven thousand, four hundred nine".