51689793 has 4 divisors (see below), whose sum is σ = 68919728. Its totient is φ = 34459860.

The previous prime is 51689773. The next prime is 51689821. The reversal of 51689793 is 39798615.

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 not a de Polignac number, because 51689793 - 2⁵ = 51689761 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51689773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8614963 + ... + 8614968.

It is an arithmetic number, because the mean of its divisors is an integer number (17229932).

Almost surely, 2^51689793 is an apocalyptic number.

It is an amenable number.

51689793 is a deficient number, since it is larger than the sum of its proper divisors (17229935).

51689793 is a wasteful number, since it uses less digits than its factorization.

51689793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17229934.

The product of its digits is 408240, while the sum is 48.

The square root of 51689793 is about 7189.5613913507. The cubic root of 51689793 is about 372.5074226409.

It can be divided in two parts, 516 and 89793, that added together give a palindrome (90309).

The spelling of 51689793 in words is "fifty-one million, six hundred eighty-nine thousand, seven hundred ninety-three".