72323725 has 6 divisors (see below), whose sum is σ = 89681450. Its totient is φ = 57858960.

The previous prime is 72323723. The next prime is 72323759. The reversal of 72323725 is 52732327.

It can be written as a sum of positive squares in 3 ways, for example, as 2617924 + 69705801 = 1618^2 + 8349^2 .

It is not a de Polignac number, because 72323725 - 2¹ = 72323723 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72323723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1446450 + ... + 1446499.

Almost surely, 2^72323725 is an apocalyptic number.

It is an amenable number.

72323725 is a deficient number, since it is larger than the sum of its proper divisors (17357725).

72323725 is a wasteful number, since it uses less digits than its factorization.

72323725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2892959 (or 2892954 counting only the distinct ones).

The product of its digits is 17640, while the sum is 31.

The square root of 72323725 is about 8504.3356589448. The cubic root of 72323725 is about 416.6393279840.

The spelling of 72323725 in words is "seventy-two million, three hundred twenty-three thousand, seven hundred twenty-five".