56971393 has 4 divisors (see below), whose sum is σ = 56989440. Its totient is φ = 56953348.

The previous prime is 56971363. The next prime is 56971423. The reversal of 56971393 is 39317965.

It is a happy number.

56971393 is nontrivially palindromic in base 13.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39317965 = 5 ⋅7863593.

It is an interprime number because it is at equal distance from previous prime (56971363) and next prime (56971423).

It is a cyclic number.

It is not a de Polignac number, because 56971393 - 2²¹ = 54874241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56971333) 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, 2905 + ... + 11062.

It is an arithmetic number, because the mean of its divisors is an integer number (14247360).

Almost surely, 2^56971393 is an apocalyptic number.

It is an amenable number.

56971393 is a deficient number, since it is larger than the sum of its proper divisors (18047).

56971393 is a wasteful number, since it uses less digits than its factorization.

56971393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18046.

The product of its digits is 153090, while the sum is 43.

The square root of 56971393 is about 7547.9396526469. The cubic root of 56971393 is about 384.7857198558.

The spelling of 56971393 in words is "fifty-six million, nine hundred seventy-one thousand, three hundred ninety-three".