57998261 has 2 divisors, whose sum is σ = 57998262. Its totient is φ = 57998260.

The previous prime is 57998257. The next prime is 57998263. The reversal of 57998261 is 16289975.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37576900 + 20421361 = 6130^2 + 4519^2 .

It is a cyclic number.

It is not a de Polignac number, because 57998261 - 2² = 57998257 is a prime.

It is a Sophie Germain prime.

Together with 57998263, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57998263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28999130 + 28999131.

It is an arithmetic number, because the mean of its divisors is an integer number (28999131).

Almost surely, 2^57998261 is an apocalyptic number.

It is an amenable number.

57998261 is a deficient number, since it is larger than the sum of its proper divisors (1).

57998261 is an equidigital number, since it uses as much as digits as its factorization.

57998261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 47.

The square root of 57998261 is about 7615.6589340647. The cubic root of 57998261 is about 387.0837953721.

The spelling of 57998261 in words is "fifty-seven million, nine hundred ninety-eight thousand, two hundred sixty-one".