72782291 has 2 divisors, whose sum is σ = 72782292. Its totient is φ = 72782290.

The previous prime is 72782267. The next prime is 72782299. The reversal of 72782291 is 19228727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72782291 - 2¹⁴ = 72765907 is a prime.

It is not a weakly prime, because it can be changed into another prime (72782299) 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, 36391145 + 36391146.

It is an arithmetic number, because the mean of its divisors is an integer number (36391146).

Almost surely, 2^72782291 is an apocalyptic number.

72782291 is a deficient number, since it is larger than the sum of its proper divisors (1).

72782291 is an equidigital number, since it uses as much as digits as its factorization.

72782291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 38.

The square root of 72782291 is about 8531.2537765559. The cubic root of 72782291 is about 417.5180357227.

The spelling of 72782291 in words is "seventy-two million, seven hundred eighty-two thousand, two hundred ninety-one".