72513703 has 4 divisors (see below), whose sum is σ = 72541480. Its totient is φ = 72485928.

The previous prime is 72513677. The next prime is 72513713. The reversal of 72513703 is 30731527.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30731527 = 1367 ⋅22481.

It is a cyclic number.

It is not a de Polignac number, because 72513703 - 2⁹ = 72513191 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 (72513713) 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, 9513 + ... + 15346.

It is an arithmetic number, because the mean of its divisors is an integer number (18135370).

Almost surely, 2^72513703 is an apocalyptic number.

72513703 is a deficient number, since it is larger than the sum of its proper divisors (27777).

72513703 is a wasteful number, since it uses less digits than its factorization.

72513703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27776.

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 72513703 is about 8515.4978128117. The cubic root of 72513703 is about 417.0038146592.

The spelling of 72513703 in words is "seventy-two million, five hundred thirteen thousand, seven hundred three".