51783979 has 16 divisors (see below), whose sum is σ = 57668800. Its totient is φ = 46189440.

The previous prime is 51783923. The next prime is 51784003. The reversal of 51783979 is 97938715.

It is a cyclic number.

It is not a de Polignac number, because 51783979 - 2¹⁵ = 51751211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51783079) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95449 + ... + 95989.

It is an arithmetic number, because the mean of its divisors is an integer number (3604300).

Almost surely, 2^51783979 is an apocalyptic number.

51783979 is a deficient number, since it is larger than the sum of its proper divisors (5884821).

51783979 is a wasteful number, since it uses less digits than its factorization.

51783979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790.

The product of its digits is 476280, while the sum is 49.

The square root of 51783979 is about 7196.1086011816. The cubic root of 51783979 is about 372.7335388217.

The spelling of 51783979 in words is "fifty-one million, seven hundred eighty-three thousand, nine hundred seventy-nine".