397699508 has 12 divisors (see below), whose sum is σ = 712949412. Its totient is φ = 193999680.

The previous prime is 397699487. The next prime is 397699529. The reversal of 397699508 is 805996793.

It is an interprime number because it is at equal distance from previous prime (397699487) and next prime (397699529).

It can be written as a sum of positive squares in 2 ways, for example, as 157201444 + 240498064 = 12538^2 + 15508^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212335 + ... + 1212662.

It is an arithmetic number, because the mean of its divisors is an integer number (59412451).

Almost surely, 2^397699508 is an apocalyptic number.

It is an amenable number.

397699508 is a deficient number, since it is larger than the sum of its proper divisors (315249904).

397699508 is a wasteful number, since it uses less digits than its factorization.

397699508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2425042 (or 2425040 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 56.

The square root of 397699508 is about 19942.4047697363. The cubic root of 397699508 is about 735.3910689797.

The spelling of 397699508 in words is "three hundred ninety-seven million, six hundred ninety-nine thousand, five hundred eight".