56819897 has 2 divisors, whose sum is σ = 56819898. Its totient is φ = 56819896.

The previous prime is 56819887. The next prime is 56819911. The reversal of 56819897 is 79891865.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40691641 + 16128256 = 6379^2 + 4016^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56819897 is a prime.

It is not a weakly prime, because it can be changed into another prime (56819837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28409948 + 28409949.

It is an arithmetic number, because the mean of its divisors is an integer number (28409949).

Almost surely, 2^56819897 is an apocalyptic number.

It is an amenable number.

56819897 is a deficient number, since it is larger than the sum of its proper divisors (1).

56819897 is an equidigital number, since it uses as much as digits as its factorization.

56819897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1088640, while the sum is 53.

The square root of 56819897 is about 7537.8973858762. The cubic root of 56819897 is about 384.4443482693. Note that the first 3 decimals are identical.

The spelling of 56819897 in words is "fifty-six million, eight hundred nineteen thousand, eight hundred ninety-seven".