57626729 has 2 divisors, whose sum is σ = 57626730. Its totient is φ = 57626728.

The previous prime is 57626717. The next prime is 57626773. The reversal of 57626729 is 92762675.

It is an a-pointer prime, because the next prime (57626773) can be obtained adding 57626729 to its sum of digits (44).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30085225 + 27541504 = 5485^2 + 5248^2 .

It is a cyclic number.

It is not a de Polignac number, because 57626729 - 2¹² = 57622633 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 57626729.

It is not a weakly prime, because it can be changed into another prime (57626929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28813364 + 28813365.

It is an arithmetic number, because the mean of its divisors is an integer number (28813365).

Almost surely, 2^57626729 is an apocalyptic number.

It is an amenable number.

57626729 is a deficient number, since it is larger than the sum of its proper divisors (1).

57626729 is an equidigital number, since it uses as much as digits as its factorization.

57626729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 317520, while the sum is 44.

The square root of 57626729 is about 7591.2271076553. The cubic root of 57626729 is about 386.2554820251.

The spelling of 57626729 in words is "fifty-seven million, six hundred twenty-six thousand, seven hundred twenty-nine".