57961391 has 2 divisors, whose sum is σ = 57961392. Its totient is φ = 57961390.

The previous prime is 57961373. The next prime is 57961427. The reversal of 57961391 is 19316975.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57961391 - 2⁶ = 57961327 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57961301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28980695 + 28980696.

It is an arithmetic number, because the mean of its divisors is an integer number (28980696).

Almost surely, 2^57961391 is an apocalyptic number.

57961391 is a deficient number, since it is larger than the sum of its proper divisors (1).

57961391 is an equidigital number, since it uses as much as digits as its factorization.

57961391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51030, while the sum is 41.

The square root of 57961391 is about 7613.2378788529. The cubic root of 57961391 is about 387.0017538040.

The spelling of 57961391 in words is "fifty-seven million, nine hundred sixty-one thousand, three hundred ninety-one".