51889723 has 4 divisors (see below), whose sum is σ = 53155368. Its totient is φ = 50624080.

The previous prime is 51889687. The next prime is 51889727. The reversal of 51889723 is 32798815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51889723 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51889723.

It is not an unprimeable number, because it can be changed into a prime (51889727) 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, 632761 + ... + 632842.

It is an arithmetic number, because the mean of its divisors is an integer number (13288842).

Almost surely, 2^51889723 is an apocalyptic number.

51889723 is a deficient number, since it is larger than the sum of its proper divisors (1265645).

51889723 is a wasteful number, since it uses less digits than its factorization.

51889723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265644.

The product of its digits is 120960, while the sum is 43.

The square root of 51889723 is about 7203.4521585140. The cubic root of 51889723 is about 372.9870762940.

The spelling of 51889723 in words is "fifty-one million, eight hundred eighty-nine thousand, seven hundred twenty-three".