117279509 has 6 divisors (see below), whose sum is σ = 121383990. Its totient is φ = 113179080.

The previous prime is 117279473. The next prime is 117279559. The reversal of 117279509 is 905972711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 101103025 + 16176484 = 10055^2 + 4022^2 .

It is a de Polignac number, because none of the positive numbers 2^k-117279509 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 (117279559) 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, 57314 + ... + 59324.

It is an arithmetic number, because the mean of its divisors is an integer number (20230665).

Almost surely, 2^117279509 is an apocalyptic number.

It is an amenable number.

117279509 is a deficient number, since it is larger than the sum of its proper divisors (4104481).

117279509 is an frugal number, since it uses more digits than its factorization.

117279509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051 (or 2040 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 41.

The square root of 117279509 is about 10829.5664271475. The cubic root of 117279509 is about 489.4864938403.

The spelling of 117279509 in words is "one hundred seventeen million, two hundred seventy-nine thousand, five hundred nine".