697620690 has 48 divisors (see below), whose sum is σ = 1953341208. Its totient is φ = 171721728.

The previous prime is 697620689. The next prime is 697620709. The reversal of 697620690 is 96026796.

It can be written as a sum of positive squares in 4 ways, for example, as 368524809 + 329095881 = 19197^2 + 18141^2 .

It is a super-2 number, since 2×697620690² = 973349254232152200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296959 + ... + 299298.

Almost surely, 2^697620690 is an apocalyptic number.

697620690 is an abundant number, since it is smaller than the sum of its proper divisors (1255720518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

697620690 is a wasteful number, since it uses less digits than its factorization.

697620690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 596283 (or 596280 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 697620690 is about 26412.5101041154. The cubic root of 697620690 is about 886.8968603211.

The spelling of 697620690 in words is "six hundred ninety-seven million, six hundred twenty thousand, six hundred ninety".