51920679 has 4 divisors (see below), whose sum is σ = 69227576. Its totient is φ = 34613784.

The previous prime is 51920677. The next prime is 51920707. The reversal of 51920679 is 97602915.

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

It is not a de Polignac number, because 51920679 - 2¹ = 51920677 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 (51920677) 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, 8653444 + ... + 8653449.

It is an arithmetic number, because the mean of its divisors is an integer number (17306894).

Almost surely, 2^51920679 is an apocalyptic number.

51920679 is a deficient number, since it is larger than the sum of its proper divisors (17306897).

51920679 is a wasteful number, since it uses less digits than its factorization.

51920679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17306896.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 51920679 is about 7205.6005301432. The cubic root of 51920679 is about 373.0612328705.

The spelling of 51920679 in words is "fifty-one million, nine hundred twenty thousand, six hundred seventy-nine".