72925109 has 4 divisors (see below), whose sum is σ = 73103820. Its totient is φ = 72746400.

The previous prime is 72925103. The next prime is 72925117. The reversal of 72925109 is 90152927.

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

It can be written as a sum of positive squares in 2 ways, for example, as 62362609 + 10562500 = 7897^2 + 3250^2 .

It is a cyclic number.

It is not a de Polignac number, because 72925109 - 2⁸ = 72924853 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 (72925103) 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, 88742 + ... + 89559.

It is an arithmetic number, because the mean of its divisors is an integer number (18275955).

Almost surely, 2^72925109 is an apocalyptic number.

It is an amenable number.

72925109 is a deficient number, since it is larger than the sum of its proper divisors (178711).

72925109 is a wasteful number, since it uses less digits than its factorization.

72925109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178710.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 72925109 is about 8539.6199564149. The cubic root of 72925109 is about 417.7909506943.

The spelling of 72925109 in words is "seventy-two million, nine hundred twenty-five thousand, one hundred nine".