397024913 has 4 divisors (see below), whose sum is σ = 397170660. Its totient is φ = 396879168.

The previous prime is 397024907. The next prime is 397024937. The reversal of 397024913 is 319420793.

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 30991489 + 366033424 = 5567^2 + 19132^2 .

It is a cyclic number.

It is not a de Polignac number, because 397024913 - 2²⁰ = 395976337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (397024213) 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, 68708 + ... + 74261.

It is an arithmetic number, because the mean of its divisors is an integer number (99292665).

Almost surely, 2^397024913 is an apocalyptic number.

It is an amenable number.

397024913 is a deficient number, since it is larger than the sum of its proper divisors (145747).

397024913 is a wasteful number, since it uses less digits than its factorization.

397024913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145746.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 397024913 is about 19925.4840091778. The cubic root of 397024913 is about 734.9750330113.

The spelling of 397024913 in words is "three hundred ninety-seven million, twenty-four thousand, nine hundred thirteen".