697415669 has 4 divisors (see below), whose sum is σ = 697703820. Its totient is φ = 697127520.

The previous prime is 697415651. The next prime is 697415707. The reversal of 697415669 is 966514796.

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 307827025 + 389588644 = 17545^2 + 19738^2 .

It is a cyclic number.

It is not a de Polignac number, because 697415669 - 2⁸ = 697415413 is a prime.

It is a super-2 number, since 2×697415669² = 972777230733435122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 697415669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (697415639) 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, 140414 + ... + 145295.

It is an arithmetic number, because the mean of its divisors is an integer number (174425955).

Almost surely, 2^697415669 is an apocalyptic number.

It is an amenable number.

697415669 is a deficient number, since it is larger than the sum of its proper divisors (288151).

697415669 is a wasteful number, since it uses less digits than its factorization.

697415669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288150.

The product of its digits is 2449440, while the sum is 53.

The square root of 697415669 is about 26408.6286845796. The cubic root of 697415669 is about 886.8099695989.

The spelling of 697415669 in words is "six hundred ninety-seven million, four hundred fifteen thousand, six hundred sixty-nine".