57008621 has 2 divisors, whose sum is σ = 57008622. Its totient is φ = 57008620.

The previous prime is 57008593. The next prime is 57008639. The reversal of 57008621 is 12680075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53728900 + 3279721 = 7330^2 + 1811^2 .

It is a cyclic number.

It is not a de Polignac number, because 57008621 - 2⁶ = 57008557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57008641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28504310 + 28504311.

It is an arithmetic number, because the mean of its divisors is an integer number (28504311).

Almost surely, 2^57008621 is an apocalyptic number.

It is an amenable number.

57008621 is a deficient number, since it is larger than the sum of its proper divisors (1).

57008621 is an equidigital number, since it uses as much as digits as its factorization.

57008621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 57008621 is about 7550.4053533569. The cubic root of 57008621 is about 384.8695144468.

Adding to 57008621 its reverse (12680075), we get a palindrome (69688696).

The spelling of 57008621 in words is "fifty-seven million, eight thousand, six hundred twenty-one".