56991301 has 4 divisors (see below), whose sum is σ = 57242592. Its totient is φ = 56740012.

The previous prime is 56991281. The next prime is 56991313. The reversal of 56991301 is 10319965.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10319965 = 5 ⋅2063993.

It is not a de Polignac number, because 56991301 - 2⁵ = 56991269 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56991331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125305 + ... + 125758.

It is an arithmetic number, because the mean of its divisors is an integer number (14310648).

Almost surely, 2^56991301 is an apocalyptic number.

It is an amenable number.

56991301 is a deficient number, since it is larger than the sum of its proper divisors (251291).

56991301 is a wasteful number, since it uses less digits than its factorization.

56991301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251290.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 56991301 is about 7549.2583079399. The cubic root of 56991301 is about 384.8305342888.

The spelling of 56991301 in words is "fifty-six million, nine hundred ninety-one thousand, three hundred one".