72904151 has 4 divisors (see below), whose sum is σ = 73902912. Its totient is φ = 71905392.

The previous prime is 72904147. The next prime is 72904163. The reversal of 72904151 is 15140927.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15140927 = 31 ⋅488417.

It is a cyclic number.

It is not a de Polignac number, because 72904151 - 2² = 72904147 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72904141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 499271 + ... + 499416.

It is an arithmetic number, because the mean of its divisors is an integer number (18475728).

Almost surely, 2^72904151 is an apocalyptic number.

72904151 is a deficient number, since it is larger than the sum of its proper divisors (998761).

72904151 is an equidigital number, since it uses as much as digits as its factorization.

72904151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 998760.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 72904151 is about 8538.3927644493. The cubic root of 72904151 is about 417.7509237781.

The spelling of 72904151 in words is "seventy-two million, nine hundred four thousand, one hundred fifty-one".