51719659 has 2 divisors, whose sum is σ = 51719660. Its totient is φ = 51719658.

The previous prime is 51719639. The next prime is 51719677. The reversal of 51719659 is 95691715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51719659 - 2²⁵ = 18165227 is a prime.

It is not a weakly prime, because it can be changed into another prime (51719609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25859829 + 25859830.

It is an arithmetic number, because the mean of its divisors is an integer number (25859830).

Almost surely, 2^51719659 is an apocalyptic number.

51719659 is a deficient number, since it is larger than the sum of its proper divisors (1).

51719659 is an equidigital number, since it uses as much as digits as its factorization.

51719659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 85050, while the sum is 43.

The square root of 51719659 is about 7191.6381304957. The cubic root of 51719659 is about 372.5791528866.

The spelling of 51719659 in words is "fifty-one million, seven hundred nineteen thousand, six hundred fifty-nine".