57456397 has 2 divisors, whose sum is σ = 57456398. Its totient is φ = 57456396.

The previous prime is 57456389. The next prime is 57456431. The reversal of 57456397 is 79365475.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54449641 + 3006756 = 7379^2 + 1734^2 .

It is a cyclic number.

It is not a de Polignac number, because 57456397 - 2³ = 57456389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57456367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28728198 + 28728199.

It is an arithmetic number, because the mean of its divisors is an integer number (28728199).

Almost surely, 2^57456397 is an apocalyptic number.

It is an amenable number.

57456397 is a deficient number, since it is larger than the sum of its proper divisors (1).

57456397 is an equidigital number, since it uses as much as digits as its factorization.

57456397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 793800, while the sum is 46.

The square root of 57456397 is about 7579.9998021108. Note that the first 3 decimals coincide. The cubic root of 57456397 is about 385.8745442295.

The spelling of 57456397 in words is "fifty-seven million, four hundred fifty-six thousand, three hundred ninety-seven".