72791237 has 2 divisors, whose sum is σ = 72791238. Its totient is φ = 72791236.

The previous prime is 72791227. The next prime is 72791267. The reversal of 72791237 is 73219727.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63218401 + 9572836 = 7951^2 + 3094^2 .

It is a cyclic number.

It is not a de Polignac number, because 72791237 - 2²⁶ = 5682373 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72791237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72791227) 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, 36395618 + 36395619.

It is an arithmetic number, because the mean of its divisors is an integer number (36395619).

Almost surely, 2^72791237 is an apocalyptic number.

It is an amenable number.

72791237 is a deficient number, since it is larger than the sum of its proper divisors (1).

72791237 is an equidigital number, since it uses as much as digits as its factorization.

72791237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 37044, while the sum is 38.

The square root of 72791237 is about 8531.7780679059. The cubic root of 72791237 is about 417.5351413642.

The spelling of 72791237 in words is "seventy-two million, seven hundred ninety-one thousand, two hundred thirty-seven".