117997009 has 4 divisors (see below), whose sum is σ = 127073716. Its totient is φ = 108920304.

The previous prime is 117996947. The next prime is 117997063. The reversal of 117997009 is 900799711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32490000 + 85507009 = 5700^2 + 9247^2 .

It is a cyclic number.

It is not a de Polignac number, because 117997009 - 2¹³ = 117988817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117997069) 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, 4538334 + ... + 4538359.

It is an arithmetic number, because the mean of its divisors is an integer number (31768429).

Almost surely, 2^117997009 is an apocalyptic number.

It is an amenable number.

117997009 is a deficient number, since it is larger than the sum of its proper divisors (9076707).

117997009 is an equidigital number, since it uses as much as digits as its factorization.

117997009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9076706.

The product of its (nonzero) digits is 35721, while the sum is 43.

The square root of 117997009 is about 10862.6428183937. The cubic root of 117997009 is about 490.4826689195.

The spelling of 117997009 in words is "one hundred seventeen million, nine hundred ninety-seven thousand, nine".