72513634 has 8 divisors (see below), whose sum is σ = 108841068. Its totient is φ = 36233280.

The previous prime is 72513629. The next prime is 72513643. The reversal of 72513634 is 43631527.

It can be written as a sum of positive squares in 2 ways, for example, as 59213025 + 13300609 = 7695^2 + 3647^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 72513596 and 72513605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7627 + ... + 14254.

Almost surely, 2^72513634 is an apocalyptic number.

72513634 is a deficient number, since it is larger than the sum of its proper divisors (36327434).

72513634 is a wasteful number, since it uses less digits than its factorization.

72513634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23540.

The product of its digits is 15120, while the sum is 31.

The square root of 72513634 is about 8515.4937613740. The cubic root of 72513634 is about 417.0036823932.

The spelling of 72513634 in words is "seventy-two million, five hundred thirteen thousand, six hundred thirty-four".