72845603 has 4 divisors (see below), whose sum is σ = 72865728. Its totient is φ = 72825480.

The previous prime is 72845599. The next prime is 72845609. The reversal of 72845603 is 30654827.

It is a happy number.

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 72845603 - 2² = 72845599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72845609) 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, 2963 + ... + 12428.

It is an arithmetic number, because the mean of its divisors is an integer number (18216432).

Almost surely, 2^72845603 is an apocalyptic number.

72845603 is a deficient number, since it is larger than the sum of its proper divisors (20125).

72845603 is a wasteful number, since it uses less digits than its factorization.

72845603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20124.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 72845603 is about 8534.9635617266. The cubic root of 72845603 is about 417.6390644346.

The spelling of 72845603 in words is "seventy-two million, eight hundred forty-five thousand, six hundred three".