72445113 has 12 divisors (see below), whose sum is σ = 112692580. Its totient is φ = 44581536.

The previous prime is 72445111. The next prime is 72445159. The reversal of 72445113 is 31154427.

It can be written as a sum of positive squares in 2 ways, for example, as 9290304 + 63154809 = 3048^2 + 7947^2 .

It is not a de Polignac number, because 72445113 - 2¹ = 72445111 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (72445111) 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 11 ways as a sum of consecutive naturals, for example, 309478 + ... + 309711.

Almost surely, 2^72445113 is an apocalyptic number.

It is an amenable number.

72445113 is a deficient number, since it is larger than the sum of its proper divisors (40247467).

72445113 is a wasteful number, since it uses less digits than its factorization.

72445113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 619208 (or 619205 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 72445113 is about 8511.4694970963. The cubic root of 72445113 is about 416.8722932436.

The spelling of 72445113 in words is "seventy-two million, four hundred forty-five thousand, one hundred thirteen".