57703981 has 2 divisors, whose sum is σ = 57703982. Its totient is φ = 57703980.

The previous prime is 57703973. The next prime is 57704021. The reversal of 57703981 is 18930775.

It is an a-pointer prime, because the next prime (57704021) can be obtained adding 57703981 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51408900 + 6295081 = 7170^2 + 2509^2 .

It is a cyclic number.

It is not a de Polignac number, because 57703981 - 2³ = 57703973 is a prime.

It is a super-2 number, since 2×57703981² = 6659498846496722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57703181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28851990 + 28851991.

It is an arithmetic number, because the mean of its divisors is an integer number (28851991).

Almost surely, 2^57703981 is an apocalyptic number.

It is an amenable number.

57703981 is a deficient number, since it is larger than the sum of its proper divisors (1).

57703981 is an equidigital number, since it uses as much as digits as its factorization.

57703981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 57703981 is about 7596.3136454467. The cubic root of 57703981 is about 386.4280043094.

The spelling of 57703981 in words is "fifty-seven million, seven hundred three thousand, nine hundred eighty-one".