72499457 has 2 divisors, whose sum is σ = 72499458. Its totient is φ = 72499456.

The previous prime is 72499451. The next prime is 72499463. The reversal of 72499457 is 75499427.

It is a balanced prime because it is at equal distance from previous prime (72499451) and next prime (72499463).

It can be written as a sum of positive squares in only one way, i.e., 67305616 + 5193841 = 8204^2 + 2279^2 .

It is an emirp because it is prime and its reverse (75499427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72499457 - 2⁸ = 72499201 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72499451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36249728 + 36249729.

It is an arithmetic number, because the mean of its divisors is an integer number (36249729).

Almost surely, 2^72499457 is an apocalyptic number.

It is an amenable number.

72499457 is a deficient number, since it is larger than the sum of its proper divisors (1).

72499457 is an equidigital number, since it uses as much as digits as its factorization.

72499457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 47.

The square root of 72499457 is about 8514.6612968456. The cubic root of 72499457 is about 416.9765047615.

The spelling of 72499457 in words is "seventy-two million, four hundred ninety-nine thousand, four hundred fifty-seven".