397574661 has 12 divisors (see below), whose sum is σ = 582671936. Its totient is φ = 240954120.

The previous prime is 397574641. The next prime is 397574669. The reversal of 397574661 is 166475793.

It is a happy number.

It is not a de Polignac number, because 397574661 - 2⁷ = 397574533 is a prime.

It is a super-2 number, since 2×397574661² = 316131222138529842, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 397574661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397574669) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547261 + ... + 547986.

Almost surely, 2^397574661 is an apocalyptic number.

It is an amenable number.

397574661 is a deficient number, since it is larger than the sum of its proper divisors (185097275).

397574661 is a wasteful number, since it uses less digits than its factorization.

397574661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095272 (or 1095261 counting only the distinct ones).

The product of its digits is 952560, while the sum is 48.

The square root of 397574661 is about 19939.2743348398. The cubic root of 397574661 is about 735.3141088830.

The spelling of 397574661 in words is "three hundred ninety-seven million, five hundred seventy-four thousand, six hundred sixty-one".