117854909 has 2 divisors, whose sum is σ = 117854910. Its totient is φ = 117854908.

The previous prime is 117854899. The next prime is 117854917. The reversal of 117854909 is 909458711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76510009 + 41344900 = 8747^2 + 6430^2 .

It is a cyclic number.

It is not a de Polignac number, because 117854909 - 2¹² = 117850813 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117854909.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117854939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58927454 + 58927455.

It is an arithmetic number, because the mean of its divisors is an integer number (58927455).

Almost surely, 2^117854909 is an apocalyptic number.

It is an amenable number.

117854909 is a deficient number, since it is larger than the sum of its proper divisors (1).

117854909 is an equidigital number, since it uses as much as digits as its factorization.

117854909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 117854909 is about 10856.1000824421. The cubic root of 117854909 is about 490.2856989998.

The spelling of 117854909 in words is "one hundred seventeen million, eight hundred fifty-four thousand, nine hundred nine".