57720953 has 2 divisors, whose sum is σ = 57720954. Its totient is φ = 57720952.

The previous prime is 57720889. The next prime is 57720959. The reversal of 57720953 is 35902775.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54346384 + 3374569 = 7372^2 + 1837^2 .

It is a cyclic number.

It is not a de Polignac number, because 57720953 - 2⁶ = 57720889 is a prime.

It is not a weakly prime, because it can be changed into another prime (57720959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28860476 + 28860477.

It is an arithmetic number, because the mean of its divisors is an integer number (28860477).

Almost surely, 2^57720953 is an apocalyptic number.

It is an amenable number.

57720953 is a deficient number, since it is larger than the sum of its proper divisors (1).

57720953 is an equidigital number, since it uses as much as digits as its factorization.

57720953 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 66150, while the sum is 38.

The square root of 57720953 is about 7597.4306841195. The cubic root of 57720953 is about 386.4658862318.

The spelling of 57720953 in words is "fifty-seven million, seven hundred twenty thousand, nine hundred fifty-three".