71981922 has 8 divisors (see below), whose sum is σ = 143963856. Its totient is φ = 23993972.

The previous prime is 71981879. The next prime is 71981933. The reversal of 71981922 is 22918917.

It is a sphenic number, since it is the product of 3 distinct primes.

71981922 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5998488 + ... + 5998499.

It is an arithmetic number, because the mean of its divisors is an integer number (17995482).

Almost surely, 2^71981922 is an apocalyptic number.

71981922 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71981922 is a wasteful number, since it uses less digits than its factorization.

71981922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11996992.

The product of its digits is 18144, while the sum is 39.

The square root of 71981922 is about 8484.2160509973. The cubic root of 71981922 is about 415.9819434039.

The spelling of 71981922 in words is "seventy-one million, nine hundred eighty-one thousand, nine hundred twenty-two".