72164291 has 2 divisors, whose sum is σ = 72164292. Its totient is φ = 72164290.

The previous prime is 72164251. The next prime is 72164297. The reversal of 72164291 is 19246127.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72164291 - 2⁶ = 72164227 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72164297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36082145 + 36082146.

It is an arithmetic number, because the mean of its divisors is an integer number (36082146).

Almost surely, 2^72164291 is an apocalyptic number.

72164291 is a deficient number, since it is larger than the sum of its proper divisors (1).

72164291 is an equidigital number, since it uses as much as digits as its factorization.

72164291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 32.

The square root of 72164291 is about 8494.9567980067. The cubic root of 72164291 is about 416.3329492876.

The spelling of 72164291 in words is "seventy-two million, one hundred sixty-four thousand, two hundred ninety-one".