71612972 has 6 divisors (see below), whose sum is σ = 125322708. Its totient is φ = 35806484.

The previous prime is 71612971. The next prime is 71612999. The reversal of 71612972 is 27921617.

It is not an unprimeable number, because it can be changed into a prime (71612971) 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, 8951618 + ... + 8951625.

It is an arithmetic number, because the mean of its divisors is an integer number (20887118).

Almost surely, 2^71612972 is an apocalyptic number.

It is an amenable number.

71612972 is a deficient number, since it is larger than the sum of its proper divisors (53709736).

71612972 is a wasteful number, since it uses less digits than its factorization.

71612972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17903247 (or 17903245 counting only the distinct ones).

The product of its digits is 10584, while the sum is 35.

The square root of 71612972 is about 8462.4448004108. Note that the first 3 decimals coincide. The cubic root of 71612972 is about 415.2700076734.

The spelling of 71612972 in words is "seventy-one million, six hundred twelve thousand, nine hundred seventy-two".