72651791 has 2 divisors, whose sum is σ = 72651792. Its totient is φ = 72651790.

The previous prime is 72651781. The next prime is 72651841. The reversal of 72651791 is 19715627.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72651791 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72651701) 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, 36325895 + 36325896.

It is an arithmetic number, because the mean of its divisors is an integer number (36325896).

Almost surely, 2^72651791 is an apocalyptic number.

72651791 is a deficient number, since it is larger than the sum of its proper divisors (1).

72651791 is an equidigital number, since it uses as much as digits as its factorization.

72651791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 72651791 is about 8523.6019968086. The cubic root of 72651791 is about 417.2683472328.

The spelling of 72651791 in words is "seventy-two million, six hundred fifty-one thousand, seven hundred ninety-one".