72907903 has 4 divisors (see below), whose sum is σ = 72944248. Its totient is φ = 72871560.

The previous prime is 72907867. The next prime is 72907949. The reversal of 72907903 is 30970927.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72907903 - 2⁹ = 72907391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72901903) 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, 14976 + ... + 19237.

It is an arithmetic number, because the mean of its divisors is an integer number (18236062).

Almost surely, 2^72907903 is an apocalyptic number.

72907903 is a deficient number, since it is larger than the sum of its proper divisors (36345).

72907903 is a wasteful number, since it uses less digits than its factorization.

72907903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36344.

The product of its (nonzero) digits is 23814, while the sum is 37.

The square root of 72907903 is about 8538.6124751039. The cubic root of 72907903 is about 417.7580901490.

The spelling of 72907903 in words is "seventy-two million, nine hundred seven thousand, nine hundred three".