71970979 has 24 divisors (see below), whose sum is σ = 81702432. Its totient is φ = 63148800.

The previous prime is 71970967. The next prime is 71970989. The reversal of 71970979 is 97907917.

It is a happy number.

It is not a de Polignac number, because 71970979 - 2⁵ = 71970947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71970989) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 476554 + ... + 476704.

It is an arithmetic number, because the mean of its divisors is an integer number (3404268).

Almost surely, 2^71970979 is an apocalyptic number.

71970979 is a deficient number, since it is larger than the sum of its proper divisors (9731453).

71970979 is a wasteful number, since it uses less digits than its factorization.

71970979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267 (or 244 counting only the distinct ones).

The product of its (nonzero) digits is 250047, while the sum is 49.

The square root of 71970979 is about 8483.5711230590. The cubic root of 71970979 is about 415.9608625502.

The spelling of 71970979 in words is "seventy-one million, nine hundred seventy thousand, nine hundred seventy-nine".