72422591 has 2 divisors, whose sum is σ = 72422592. Its totient is φ = 72422590.

The previous prime is 72422569. The next prime is 72422617. The reversal of 72422591 is 19522427.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72422591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72422521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36211295 + 36211296.

It is an arithmetic number, because the mean of its divisors is an integer number (36211296).

Almost surely, 2^72422591 is an apocalyptic number.

72422591 is a deficient number, since it is larger than the sum of its proper divisors (1).

72422591 is an equidigital number, since it uses as much as digits as its factorization.

72422591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 32.

The square root of 72422591 is about 8510.1463559683. The cubic root of 72422591 is about 416.8290891750.

The spelling of 72422591 in words is "seventy-two million, four hundred twenty-two thousand, five hundred ninety-one".