72743889 has 16 divisors (see below), whose sum is σ = 98385728. Its totient is φ = 47803392.

The previous prime is 72743857. The next prime is 72743899. The reversal of 72743889 is 98834727.

It is not a de Polignac number, because 72743889 - 2⁵ = 72743857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72743819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132714 + ... + 133260.

It is an arithmetic number, because the mean of its divisors is an integer number (6149108).

Almost surely, 2^72743889 is an apocalyptic number.

It is an amenable number.

72743889 is a deficient number, since it is larger than the sum of its proper divisors (25641839).

72743889 is a wasteful number, since it uses less digits than its factorization.

72743889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1104.

The product of its digits is 677376, while the sum is 48.

The square root of 72743889 is about 8529.0028139285. The cubic root of 72743889 is about 417.4445913535. Note that the first 3 decimals are identical.

Subtracting from 72743889 its sum of digits (48), we obtain a square (72743841 = 8529²).

The spelling of 72743889 in words is "seventy-two million, seven hundred forty-three thousand, eight hundred eighty-nine".