79609549 has 6 divisors (see below), whose sum is σ = 80448234. Its totient is φ = 78779520.

The previous prime is 79609529. The next prime is 79609559. The reversal of 79609549 is 94590697.

It can be written as a sum of positive squares in 3 ways, for example, as 20088324 + 59521225 = 4482^2 + 7715^2 .

It is not a de Polignac number, because 79609549 - 2²⁵ = 46055117 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 (79609529) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5179 + ... + 13639.

It is an arithmetic number, because the mean of its divisors is an integer number (13408039).

Almost surely, 2^79609549 is an apocalyptic number.

It is an amenable number.

79609549 is a deficient number, since it is larger than the sum of its proper divisors (838685).

79609549 is an frugal number, since it uses more digits than its factorization.

79609549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8655 (or 8558 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 79609549 is about 8922.4183380965. The cubic root of 79609549 is about 430.1847934775.

The spelling of 79609549 in words is "seventy-nine million, six hundred nine thousand, five hundred forty-nine".