72609503 has 4 divisors (see below), whose sum is σ = 74571960. Its totient is φ = 70647048.

The previous prime is 72609487. The next prime is 72609529. The reversal of 72609503 is 30590627.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 72609503 - 2⁴ = 72609487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72609503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72609553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 981173 + ... + 981246.

It is an arithmetic number, because the mean of its divisors is an integer number (18642990).

Almost surely, 2^72609503 is an apocalyptic number.

72609503 is a deficient number, since it is larger than the sum of its proper divisors (1962457).

72609503 is a wasteful number, since it uses less digits than its factorization.

72609503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962456.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 72609503 is about 8521.1209943293. The cubic root of 72609503 is about 417.1873725436.

The spelling of 72609503 in words is "seventy-two million, six hundred nine thousand, five hundred three".