72704091 has 8 divisors (see below), whose sum is σ = 97022464. Its totient is φ = 48427560.

The previous prime is 72704077. The next prime is 72704101. The reversal of 72704091 is 19040727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 72704091 - 2¹⁴ = 72687707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72704491) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6151 + ... + 13536.

It is an arithmetic number, because the mean of its divisors is an integer number (12127808).

Almost surely, 2^72704091 is an apocalyptic number.

72704091 is a deficient number, since it is larger than the sum of its proper divisors (24318373).

72704091 is a wasteful number, since it uses less digits than its factorization.

72704091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20921.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 72704091 is about 8526.6693966636. The cubic root of 72704091 is about 417.3684498351.

The spelling of 72704091 in words is "seventy-two million, seven hundred four thousand, ninety-one".