397855593 has 6 divisors (see below), whose sum is σ = 574680314. Its totient is φ = 265237056.

The previous prime is 397855589. The next prime is 397855597. The reversal of 397855593 is 395558793.

It is a happy number.

397855593 is a `hidden beast` number, since 3 + 9 + 7 + 85 + 559 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (397855589) and next prime (397855597).

It can be written as a sum of positive squares in only one way, i.e., 246270249 + 151585344 = 15693^2 + 12312^2 .

It is not a de Polignac number, because 397855593 - 2² = 397855589 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 (397855597) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22103080 + ... + 22103097.

Almost surely, 2^397855593 is an apocalyptic number.

It is an amenable number.

397855593 is a deficient number, since it is larger than the sum of its proper divisors (176824721).

397855593 is a wasteful number, since it uses less digits than its factorization.

397855593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44206183 (or 44206180 counting only the distinct ones).

The product of its digits is 5103000, while the sum is 54.

The square root of 397855593 is about 19946.3177804827. The cubic root of 397855593 is about 735.4872626298.

The spelling of 397855593 in words is "three hundred ninety-seven million, eight hundred fifty-five thousand, five hundred ninety-three".