72904719 has 4 divisors (see below), whose sum is σ = 97206296. Its totient is φ = 48603144.

The previous prime is 72904697. The next prime is 72904723. The reversal of 72904719 is 91740927.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72904719 - 2⁹ = 72904207 is a prime.

It is a super-2 number, since 2×72904719² = 10630196104937922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72904019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12150784 + ... + 12150789.

It is an arithmetic number, because the mean of its divisors is an integer number (24301574).

Almost surely, 2^72904719 is an apocalyptic number.

72904719 is a deficient number, since it is larger than the sum of its proper divisors (24301577).

72904719 is a wasteful number, since it uses less digits than its factorization.

72904719 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24301576.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 72904719 is about 8538.4260259137. The cubic root of 72904719 is about 417.7520086816.

The spelling of 72904719 in words is "seventy-two million, nine hundred four thousand, seven hundred nineteen".