72123907 has 8 divisors (see below), whose sum is σ = 72781040. Its totient is φ = 71470080.

The previous prime is 72123893. The next prime is 72123913. The reversal of 72123907 is 70932127.

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 72123907 - 2¹⁵ = 72091139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72123917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63319 + ... + 64447.

It is an arithmetic number, because the mean of its divisors is an integer number (9097630).

Almost surely, 2^72123907 is an apocalyptic number.

72123907 is a deficient number, since it is larger than the sum of its proper divisors (657133).

72123907 is a wasteful number, since it uses less digits than its factorization.

72123907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653.

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 72123907 is about 8492.5795256801. The cubic root of 72123907 is about 416.2552731644.

The spelling of 72123907 in words is "seventy-two million, one hundred twenty-three thousand, nine hundred seven".