57761321 has 2 divisors, whose sum is σ = 57761322. Its totient is φ = 57761320.

The previous prime is 57761317. The next prime is 57761351. The reversal of 57761321 is 12316775.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33120025 + 24641296 = 5755^2 + 4964^2 .

It is a cyclic number.

It is not a de Polignac number, because 57761321 - 2² = 57761317 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (57761351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28880660 + 28880661.

It is an arithmetic number, because the mean of its divisors is an integer number (28880661).

Almost surely, 2^57761321 is an apocalyptic number.

It is an amenable number.

57761321 is a deficient number, since it is larger than the sum of its proper divisors (1).

57761321 is an equidigital number, since it uses as much as digits as its factorization.

57761321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8820, while the sum is 32.

The square root of 57761321 is about 7600.0869073978. The cubic root of 57761321 is about 386.5559587769. Note that the first 3 decimals are identical.

The spelling of 57761321 in words is "fifty-seven million, seven hundred sixty-one thousand, three hundred twenty-one".