72903634 has 8 divisors (see below), whose sum is σ = 109511820. Its totient is φ = 36399696.

The previous prime is 72903587. The next prime is 72903637. The reversal of 72903634 is 43630927.

It can be written as a sum of positive squares in 2 ways, for example, as 67158025 + 5745609 = 8195^2 + 2397^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 72903634.

It is not an unprimeable number, because it can be changed into a prime (72903637) 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 3 ways as a sum of consecutive naturals, for example, 24289 + ... + 27124.

Almost surely, 2^72903634 is an apocalyptic number.

72903634 is a deficient number, since it is larger than the sum of its proper divisors (36608186).

72903634 is a wasteful number, since it uses less digits than its factorization.

72903634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52124.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 72903634 is about 8538.3624893770. The cubic root of 72903634 is about 417.7499362818.

It can be divided in two parts, 72903 and 634, that added together give a palindrome (73537).

The spelling of 72903634 in words is "seventy-two million, nine hundred three thousand, six hundred thirty-four".