51373979 has 4 divisors (see below), whose sum is σ = 51411360. Its totient is φ = 51336600.

The previous prime is 51373939. The next prime is 51373997. The reversal of 51373979 is 97937315.

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

It is a cyclic number.

It is not a de Polignac number, because 51373979 - 2²⁴ = 34596763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51373919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16547 + ... + 19404.

It is an arithmetic number, because the mean of its divisors is an integer number (12852840).

Almost surely, 2^51373979 is an apocalyptic number.

51373979 is a deficient number, since it is larger than the sum of its proper divisors (37381).

51373979 is a wasteful number, since it uses less digits than its factorization.

51373979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37380.

The product of its digits is 178605, while the sum is 44.

The square root of 51373979 is about 7167.5643701330. The cubic root of 51373979 is about 371.7472244112.

The spelling of 51373979 in words is "fifty-one million, three hundred seventy-three thousand, nine hundred seventy-nine".