72913433 has 2 divisors, whose sum is σ = 72913434. Its totient is φ = 72913432.

The previous prime is 72913409. The next prime is 72913481. The reversal of 72913433 is 33431927.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49603849 + 23309584 = 7043^2 + 4828^2 .

It is an emirp because it is prime and its reverse (33431927) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72913433 - 2¹⁶ = 72847897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 72913433.

It is not a weakly prime, because it can be changed into another prime (72913033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36456716 + 36456717.

It is an arithmetic number, because the mean of its divisors is an integer number (36456717).

Almost surely, 2^72913433 is an apocalyptic number.

It is an amenable number.

72913433 is a deficient number, since it is larger than the sum of its proper divisors (1).

72913433 is an equidigital number, since it uses as much as digits as its factorization.

72913433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 32.

The square root of 72913433 is about 8538.9362920682. The cubic root of 72913433 is about 417.7686520760.

The spelling of 72913433 in words is "seventy-two million, nine hundred thirteen thousand, four hundred thirty-three".