71884979 has 2 divisors, whose sum is σ = 71884980. Its totient is φ = 71884978.

The previous prime is 71884963. The next prime is 71884987. The reversal of 71884979 is 97948817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71884979 - 2⁴ = 71884963 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71884979.

It is not a weakly prime, because it can be changed into another prime (71884919) 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 as a sum of consecutive naturals, namely, 35942489 + 35942490.

It is an arithmetic number, because the mean of its divisors is an integer number (35942490).

Almost surely, 2^71884979 is an apocalyptic number.

71884979 is a deficient number, since it is larger than the sum of its proper divisors (1).

71884979 is an equidigital number, since it uses as much as digits as its factorization.

71884979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 53.

The square root of 71884979 is about 8478.5009877926. The cubic root of 71884979 is about 415.7951156862.

It can be divided in two parts, 7188 and 4979, that added together give a cube (12167 = 23³).

The spelling of 71884979 in words is "seventy-one million, eight hundred eighty-four thousand, nine hundred seventy-nine".