71927321 has 4 divisors (see below), whose sum is σ = 72048000. Its totient is φ = 71806644.

The previous prime is 71927311. The next prime is 71927327. The reversal of 71927321 is 12372917.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12372917 = 109 ⋅113513.

It is a cyclic number.

It is not a de Polignac number, because 71927321 - 2⁶ = 71927257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71927327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59441 + ... + 60638.

It is an arithmetic number, because the mean of its divisors is an integer number (18012000).

Almost surely, 2^71927321 is an apocalyptic number.

It is an amenable number.

71927321 is a deficient number, since it is larger than the sum of its proper divisors (120679).

71927321 is a wasteful number, since it uses less digits than its factorization.

71927321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120678.

The product of its digits is 5292, while the sum is 32.

The square root of 71927321 is about 8480.9976417872. The cubic root of 71927321 is about 415.8767374726.

The spelling of 71927321 in words is "seventy-one million, nine hundred twenty-seven thousand, three hundred twenty-one".