56357989 has 4 divisors (see below), whose sum is σ = 56458656. Its totient is φ = 56257324.

The previous prime is 56357963. The next prime is 56357999. The reversal of 56357989 is 98975365.

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.

It is a cyclic number.

It is not a de Polignac number, because 56357989 - 2¹⁷ = 56226917 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 (56357929) 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, 49489 + ... + 50614.

It is an arithmetic number, because the mean of its divisors is an integer number (14114664).

Almost surely, 2^56357989 is an apocalyptic number.

It is an amenable number.

56357989 is a deficient number, since it is larger than the sum of its proper divisors (100667).

56357989 is a wasteful number, since it uses less digits than its factorization.

56357989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100666.

The product of its digits is 2041200, while the sum is 52.

The square root of 56357989 is about 7507.1958146834. The cubic root of 56357989 is about 383.3997534981.

The spelling of 56357989 in words is "fifty-six million, three hundred fifty-seven thousand, nine hundred eighty-nine".