72704291 has 8 divisors (see below), whose sum is σ = 83979504. Its totient is φ = 62206720.

The previous prime is 72704273. The next prime is 72704293. The reversal of 72704291 is 19240727.

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

It is a cyclic number.

It is not a de Polignac number, because 72704291 - 2⁶ = 72704227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72704293) 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 7 ways as a sum of consecutive naturals, for example, 194210 + ... + 194583.

It is an arithmetic number, because the mean of its divisors is an integer number (10497438).

Almost surely, 2^72704291 is an apocalyptic number.

72704291 is a deficient number, since it is larger than the sum of its proper divisors (11275213).

72704291 is a wasteful number, since it uses less digits than its factorization.

72704291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388821.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 72704291 is about 8526.6811245642. The cubic root of 72704291 is about 417.3688325445.

The spelling of 72704291 in words is "seventy-two million, seven hundred four thousand, two hundred ninety-one".