57998729 has 2 divisors, whose sum is σ = 57998730. Its totient is φ = 57998728.

The previous prime is 57998687. The next prime is 57998761. The reversal of 57998729 is 92789975.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30415225 + 27583504 = 5515^2 + 5252^2 .

It is a cyclic number.

It is not a de Polignac number, because 57998729 - 2¹⁶ = 57933193 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (57998789) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28999364 + 28999365.

It is an arithmetic number, because the mean of its divisors is an integer number (28999365).

Almost surely, 2^57998729 is an apocalyptic number.

It is an amenable number.

57998729 is a deficient number, since it is larger than the sum of its proper divisors (1).

57998729 is an equidigital number, since it uses as much as digits as its factorization.

57998729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2857680, while the sum is 56.

The square root of 57998729 is about 7615.6896601687. The cubic root of 57998729 is about 387.0848365225.

The spelling of 57998729 in words is "fifty-seven million, nine hundred ninety-eight thousand, seven hundred twenty-nine".