56817457 has 2 divisors, whose sum is σ = 56817458. Its totient is φ = 56817456.

The previous prime is 56817421. The next prime is 56817461. The reversal of 56817457 is 75471865.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55219761 + 1597696 = 7431^2 + 1264^2 .

It is a cyclic number.

It is not a de Polignac number, because 56817457 - 2⁷ = 56817329 is a prime.

It is not a weakly prime, because it can be changed into another prime (56817487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28408728 + 28408729.

It is an arithmetic number, because the mean of its divisors is an integer number (28408729).

Almost surely, 2^56817457 is an apocalyptic number.

It is an amenable number.

56817457 is a deficient number, since it is larger than the sum of its proper divisors (1).

56817457 is an equidigital number, since it uses as much as digits as its factorization.

56817457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 43.

The square root of 56817457 is about 7537.7355352917. The cubic root of 56817457 is about 384.4388451639.

The spelling of 56817457 in words is "fifty-six million, eight hundred seventeen thousand, four hundred fifty-seven".