57721463 has 2 divisors, whose sum is σ = 57721464. Its totient is φ = 57721462.

The previous prime is 57721457. The next prime is 57721483. The reversal of 57721463 is 36412775.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 57721463 - 2¹² = 57717367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57721403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28860731 + 28860732.

It is an arithmetic number, because the mean of its divisors is an integer number (28860732).

Almost surely, 2^57721463 is an apocalyptic number.

57721463 is a deficient number, since it is larger than the sum of its proper divisors (1).

57721463 is an equidigital number, since it uses as much as digits as its factorization.

57721463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 35.

The square root of 57721463 is about 7597.4642480238. The cubic root of 57721463 is about 386.4670244495.

The spelling of 57721463 in words is "fifty-seven million, seven hundred twenty-one thousand, four hundred sixty-three".