72785099 has 4 divisors (see below), whose sum is σ = 75294960. Its totient is φ = 70275240.

The previous prime is 72785051. The next prime is 72785101. The reversal of 72785099 is 99058727.

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 72785099 - 2¹² = 72781003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72785399) 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, 1254887 + ... + 1254944.

It is an arithmetic number, because the mean of its divisors is an integer number (18823740).

Almost surely, 2^72785099 is an apocalyptic number.

72785099 is a deficient number, since it is larger than the sum of its proper divisors (2509861).

72785099 is a wasteful number, since it uses less digits than its factorization.

72785099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2509860.

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 72785099 is about 8531.4183463244. The cubic root of 72785099 is about 417.5234050488.

The spelling of 72785099 in words is "seventy-two million, seven hundred eighty-five thousand, ninety-nine".