71959959 has 12 divisors (see below), whose sum is σ = 107295552. Its totient is φ = 46425600.

The previous prime is 71959919. The next prime is 71959967. The reversal of 71959959 is 95995917.

It is not a de Polignac number, because 71959959 - 2⁷ = 71959831 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71959919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128682 + ... + 129239.

It is an arithmetic number, because the mean of its divisors is an integer number (8941296).

Almost surely, 2^71959959 is an apocalyptic number.

71959959 is a deficient number, since it is larger than the sum of its proper divisors (35335593).

71959959 is a wasteful number, since it uses less digits than its factorization.

71959959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257958 (or 257955 counting only the distinct ones).

The product of its digits is 1148175, while the sum is 54.

The square root of 71959959 is about 8482.9216075595. The cubic root of 71959959 is about 415.9396312023.

The spelling of 71959959 in words is "seventy-one million, nine hundred fifty-nine thousand, nine hundred fifty-nine".