57670981 has 2 divisors, whose sum is σ = 57670982. Its totient is φ = 57670980.

The previous prime is 57670933. The next prime is 57670993. The reversal of 57670981 is 18907675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51122500 + 6548481 = 7150^2 + 2559^2 .

It is a cyclic number.

It is not a de Polignac number, because 57670981 - 2⁹ = 57670469 is a prime.

It is a super-2 number, since 2×57670981² = 6651884099004722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57670931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28835490 + 28835491.

It is an arithmetic number, because the mean of its divisors is an integer number (28835491).

Almost surely, 2^57670981 is an apocalyptic number.

It is an amenable number.

57670981 is a deficient number, since it is larger than the sum of its proper divisors (1).

57670981 is an equidigital number, since it uses as much as digits as its factorization.

57670981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 57670981 is about 7594.1412286051. The cubic root of 57670981 is about 386.3543262280.

The spelling of 57670981 in words is "fifty-seven million, six hundred seventy thousand, nine hundred eighty-one".