697872787959 has 4 divisors (see below), whose sum is σ = 930497050616. Its totient is φ = 465248525304.

The previous prime is 697872787949. The next prime is 697872787979. The reversal of 697872787959 is 959787278796.

It is a happy number.

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

It is not a de Polignac number, because 697872787959 - 2¹⁶ = 697872722423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697872787949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116312131324 + ... + 116312131329.

It is an arithmetic number, because the mean of its divisors is an integer number (232624262654).

Almost surely, 2^697872787959 is an apocalyptic number.

697872787959 is a deficient number, since it is larger than the sum of its proper divisors (232624262657).

697872787959 is a wasteful number, since it uses less digits than its factorization.

697872787959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232624262656.

The product of its digits is 6721263360, while the sum is 84.

The spelling of 697872787959 in words is "six hundred ninety-seven billion, eight hundred seventy-two million, seven hundred eighty-seven thousand, nine hundred fifty-nine".