697387997 has 8 divisors (see below), whose sum is σ = 720195840. Its totient is φ = 674599680.

The previous prime is 697387987. The next prime is 697388009. The reversal of 697387997 is 799783796.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 697387997 - 2⁴ = 697387981 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 (697387967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114173 + ... + 120125.

It is an arithmetic number, because the mean of its divisors is an integer number (90024480).

Almost surely, 2^697387997 is an apocalyptic number.

It is an amenable number.

697387997 is a deficient number, since it is larger than the sum of its proper divisors (22807843).

697387997 is a wasteful number, since it uses less digits than its factorization.

697387997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9763.

The product of its digits is 36006768, while the sum is 65.

The square root of 697387997 is about 26408.1047597134. The cubic root of 697387997 is about 886.7982405201.

The spelling of 697387997 in words is "six hundred ninety-seven million, three hundred eighty-seven thousand, nine hundred ninety-seven".