72908933 has 4 divisors (see below), whose sum is σ = 73083360. Its totient is φ = 72734508.

The previous prime is 72908923. The next prime is 72908959. The reversal of 72908933 is 33980927.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72908933 is a prime.

It is a super-2 number, since 2×72908933² = 10631425022396978, 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 (72908923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86585 + ... + 87422.

It is an arithmetic number, because the mean of its divisors is an integer number (18270840).

Almost surely, 2^72908933 is an apocalyptic number.

It is an amenable number.

72908933 is a deficient number, since it is larger than the sum of its proper divisors (174427).

72908933 is a wasteful number, since it uses less digits than its factorization.

72908933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174426.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 72908933 is about 8538.6727891400. The cubic root of 72908933 is about 417.7600574200.

The spelling of 72908933 in words is "seventy-two million, nine hundred eight thousand, nine hundred thirty-three".