57626381 has 2 divisors, whose sum is σ = 57626382. Its totient is φ = 57626380.

The previous prime is 57626363. The next prime is 57626389. The reversal of 57626381 is 18362675.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50282281 + 7344100 = 7091^2 + 2710^2 .

It is a cyclic number.

It is not a de Polignac number, because 57626381 - 2²² = 53432077 is a prime.

It is a super-2 number, since 2×57626381² = 6641599574314322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57626389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28813190 + 28813191.

It is an arithmetic number, because the mean of its divisors is an integer number (28813191).

Almost surely, 2^57626381 is an apocalyptic number.

It is an amenable number.

57626381 is a deficient number, since it is larger than the sum of its proper divisors (1).

57626381 is an equidigital number, since it uses as much as digits as its factorization.

57626381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 57626381 is about 7591.2041864252. The cubic root of 57626381 is about 386.2547045087.

The spelling of 57626381 in words is "fifty-seven million, six hundred twenty-six thousand, three hundred eighty-one".