56290397 has 4 divisors (see below), whose sum is σ = 57599520. Its totient is φ = 54981276.

The previous prime is 56290391. The next prime is 56290411. The reversal of 56290397 is 79309265.

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.

It is a cyclic number.

It is not a de Polignac number, because 56290397 - 2²⁰ = 55241821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56290391) 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, 654497 + ... + 654582.

It is an arithmetic number, because the mean of its divisors is an integer number (14399880).

Almost surely, 2^56290397 is an apocalyptic number.

It is an amenable number.

56290397 is a deficient number, since it is larger than the sum of its proper divisors (1309123).

56290397 is a wasteful number, since it uses less digits than its factorization.

56290397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1309122.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 56290397 is about 7502.6926499757. The cubic root of 56290397 is about 383.2464175135.

The spelling of 56290397 in words is "fifty-six million, two hundred ninety thousand, three hundred ninety-seven".