71979655 has 16 divisors (see below), whose sum is σ = 94392864. Its totient is φ = 52257280.

The previous prime is 71979647. The next prime is 71979667. The reversal of 71979655 is 55697917.

It is not a de Polignac number, because 71979655 - 2³ = 71979647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71979599 and 71979608.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 59739 + ... + 60931.

It is an arithmetic number, because the mean of its divisors is an integer number (5899554).

Almost surely, 2^71979655 is an apocalyptic number.

71979655 is a deficient number, since it is larger than the sum of its proper divisors (22413209).

71979655 is a wasteful number, since it uses less digits than its factorization.

71979655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2306.

The product of its digits is 595350, while the sum is 49.

The square root of 71979655 is about 8484.0824489157. The cubic root of 71979655 is about 415.9775763770.

The spelling of 71979655 in words is "seventy-one million, nine hundred seventy-nine thousand, six hundred fifty-five".