51672779 has 2 divisors, whose sum is σ = 51672780. Its totient is φ = 51672778.

The previous prime is 51672769. The next prime is 51672791. The reversal of 51672779 is 97727615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51672779 - 2²⁴ = 34895563 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51672749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25836389 + 25836390.

It is an arithmetic number, because the mean of its divisors is an integer number (25836390).

Almost surely, 2^51672779 is an apocalyptic number.

51672779 is a deficient number, since it is larger than the sum of its proper divisors (1).

51672779 is an equidigital number, since it uses as much as digits as its factorization.

51672779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185220, while the sum is 44.

The square root of 51672779 is about 7188.3780507149. The cubic root of 51672779 is about 372.4665471512.

The spelling of 51672779 in words is "fifty-one million, six hundred seventy-two thousand, seven hundred seventy-nine".