56397797 has 2 divisors, whose sum is σ = 56397798. Its totient is φ = 56397796.

The previous prime is 56397769. The next prime is 56397821. The reversal of 56397797 is 79779365.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42003361 + 14394436 = 6481^2 + 3794^2 .

It is a cyclic number.

It is not a de Polignac number, because 56397797 - 2²² = 52203493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56397767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28198898 + 28198899.

It is an arithmetic number, because the mean of its divisors is an integer number (28198899).

Almost surely, 2^56397797 is an apocalyptic number.

It is an amenable number.

56397797 is a deficient number, since it is larger than the sum of its proper divisors (1).

56397797 is an equidigital number, since it uses as much as digits as its factorization.

56397797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2500470, while the sum is 53.

The square root of 56397797 is about 7509.8466695399. The cubic root of 56397797 is about 383.4900026688.

The spelling of 56397797 in words is "fifty-six million, three hundred ninety-seven thousand, seven hundred ninety-seven".