72723889 has 12 divisors (see below), whose sum is σ = 84863424. Its totient is φ = 62320356.

The previous prime is 72723869. The next prime is 72723901. The reversal of 72723889 is 98832727.

It is not a de Polignac number, because 72723889 - 2⁹ = 72723377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72723829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14644 + ... + 18970.

It is an arithmetic number, because the mean of its divisors is an integer number (7071952).

Almost surely, 2^72723889 is an apocalyptic number.

It is an amenable number.

72723889 is a deficient number, since it is larger than the sum of its proper divisors (12139535).

72723889 is an frugal number, since it uses more digits than its factorization.

72723889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4362 (or 4334 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 72723889 is about 8527.8302633202. The cubic root of 72723889 is about 417.4063308334.

The spelling of 72723889 in words is "seventy-two million, seven hundred twenty-three thousand, eight hundred eighty-nine".