57989937721 has 3 divisors (see below), whose sum is σ = 57990178533. Its totient is φ = 57989696910.

The previous prime is 57989937703. The next prime is 57989937739. The reversal of 57989937721 is 12773998975.

The square root of 57989937721 is 240811.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (57989937703) and next prime (57989937739).

It is not a de Polignac number, because 57989937721 - 2¹⁵ = 57989904953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57989937521) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 120406 + ... + 361216.

It is an arithmetic number, because the mean of its divisors is an integer number (19330059511).

Almost surely, 2^57989937721 is an apocalyptic number.

57989937721 is the 240811-st square number.

57989937721 is the 120406-th centered octagonal number.

It is an amenable number.

57989937721 is a deficient number, since it is larger than the sum of its proper divisors (240812).

57989937721 is an frugal number, since it uses more digits than its factorization.

57989937721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481622 (or 240811 counting only the distinct ones).

The product of its digits is 60011280, while the sum is 67.

The spelling of 57989937721 in words is "fifty-seven billion, nine hundred eighty-nine million, nine hundred thirty-seven thousand, seven hundred twenty-one".