72902371 has 4 divisors (see below), whose sum is σ = 72972144. Its totient is φ = 72832600.

The previous prime is 72902339. The next prime is 72902383. The reversal of 72902371 is 17320927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17320927 = 13 ⋅1332379.

It is a cyclic number.

It is not a de Polignac number, because 72902371 - 2⁵ = 72902339 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72902771) 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 in 3 ways as a sum of consecutive naturals, for example, 33295 + ... + 35416.

It is an arithmetic number, because the mean of its divisors is an integer number (18243036).

Almost surely, 2^72902371 is an apocalyptic number.

72902371 is a deficient number, since it is larger than the sum of its proper divisors (69773).

72902371 is a wasteful number, since it uses less digits than its factorization.

72902371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69772.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72902371 is about 8538.2885287392. The cubic root of 72902371 is about 417.7475238679.

The spelling of 72902371 in words is "seventy-two million, nine hundred two thousand, three hundred seventy-one".