71928131 has 8 divisors (see below), whose sum is σ = 78542784. Its totient is φ = 65326120.

The previous prime is 71928113. The next prime is 71928161. The reversal of 71928131 is 13182917.

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

It is a cyclic number.

It is not a de Polignac number, because 71928131 - 2⁶ = 71928067 is a prime.

It is a super-2 number, since 2×71928131² = 10347312058306322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71928161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11876 + ... + 16878.

It is an arithmetic number, because the mean of its divisors is an integer number (9817848).

Almost surely, 2^71928131 is an apocalyptic number.

71928131 is a deficient number, since it is larger than the sum of its proper divisors (6614653).

71928131 is a wasteful number, since it uses less digits than its factorization.

71928131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6321.

The product of its digits is 3024, while the sum is 32.

The square root of 71928131 is about 8481.0453954687. The cubic root of 71928131 is about 415.8782985804.

The spelling of 71928131 in words is "seventy-one million, nine hundred twenty-eight thousand, one hundred thirty-one".