51745979 has 2 divisors, whose sum is σ = 51745980. Its totient is φ = 51745978.

The previous prime is 51745973. The next prime is 51746003. The reversal of 51745979 is 97954715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51745979 - 2⁴ = 51745963 is a prime.

It is not a weakly prime, because it can be changed into another prime (51745973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25872989 + 25872990.

It is an arithmetic number, because the mean of its divisors is an integer number (25872990).

Almost surely, 2^51745979 is an apocalyptic number.

51745979 is a deficient number, since it is larger than the sum of its proper divisors (1).

51745979 is an equidigital number, since it uses as much as digits as its factorization.

51745979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 47.

The square root of 51745979 is about 7193.4678007203. The cubic root of 51745979 is about 372.6423436894.

The spelling of 51745979 in words is "fifty-one million, seven hundred forty-five thousand, nine hundred seventy-nine".