697564431 has 6 divisors (see below), whose sum is σ = 1007593080. Its totient is φ = 465042948.

The previous prime is 697564409. The next prime is 697564433. The reversal of 697564431 is 134465796.

It is not a de Polignac number, because 697564431 - 2¹³ = 697556239 is a prime.

It is a super-2 number, since 2×697564431² = 973192270792707522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697564433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38753571 + ... + 38753588.

It is an arithmetic number, because the mean of its divisors is an integer number (167932180).

Almost surely, 2^697564431 is an apocalyptic number.

697564431 is a deficient number, since it is larger than the sum of its proper divisors (310028649).

697564431 is a wasteful number, since it uses less digits than its factorization.

697564431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77507165 (or 77507162 counting only the distinct ones).

The product of its digits is 544320, while the sum is 45.

The square root of 697564431 is about 26411.4450759514. The cubic root of 697564431 is about 886.8730186774.

The spelling of 697564431 in words is "six hundred ninety-seven million, five hundred sixty-four thousand, four hundred thirty-one".