51594989 has 4 divisors (see below), whose sum is σ = 51685920. Its totient is φ = 51504060.

The previous prime is 51594971. The next prime is 51594997. The reversal of 51594989 is 98949515.

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 51594989 - 2¹² = 51590893 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 (51594289) 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, 44609 + ... + 45750.

It is an arithmetic number, because the mean of its divisors is an integer number (12921480).

Almost surely, 2^51594989 is an apocalyptic number.

It is an amenable number.

51594989 is a deficient number, since it is larger than the sum of its proper divisors (90931).

51594989 is an equidigital number, since it uses as much as digits as its factorization.

51594989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90930.

The product of its digits is 583200, while the sum is 50.

The square root of 51594989 is about 7182.9651955164. The cubic root of 51594989 is about 372.2795452454.

The spelling of 51594989 in words is "fifty-one million, five hundred ninety-four thousand, nine hundred eighty-nine".