79209045 has 48 divisors (see below), whose sum is σ = 142592112. Its totient is φ = 40642560.

The previous prime is 79209041. The next prime is 79209047. The reversal of 79209045 is 54090297.

It can be written as a sum of positive squares in 8 ways, for example, as 20088324 + 59120721 = 4482^2 + 7689^2 .

It is not a de Polignac number, because 79209045 - 2² = 79209041 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79209041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187935 + ... + 188355.

It is an arithmetic number, because the mean of its divisors is an integer number (2970669).

Almost surely, 2^79209045 is an apocalyptic number.

It is an amenable number.

79209045 is a deficient number, since it is larger than the sum of its proper divisors (63383067).

79209045 is a wasteful number, since it uses less digits than its factorization.

79209045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 579 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 79209045 is about 8899.9463481529. The cubic root of 79209045 is about 429.4621814036.

The spelling of 79209045 in words is "seventy-nine million, two hundred nine thousand, forty-five".