117849161 has 2 divisors, whose sum is σ = 117849162. Its totient is φ = 117849160.

The previous prime is 117849131. The next prime is 117849203. The reversal of 117849161 is 161948711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98883136 + 18966025 = 9944^2 + 4355^2 .

It is an emirp because it is prime and its reverse (161948711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117849161 - 2⁶ = 117849097 is a prime.

It is not a weakly prime, because it can be changed into another prime (117849131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58924580 + 58924581.

It is an arithmetic number, because the mean of its divisors is an integer number (58924581).

Almost surely, 2^117849161 is an apocalyptic number.

It is an amenable number.

117849161 is a deficient number, since it is larger than the sum of its proper divisors (1).

117849161 is an equidigital number, since it uses as much as digits as its factorization.

117849161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 38.

The square root of 117849161 is about 10855.8353432612. The cubic root of 117849161 is about 490.2777281593.

The spelling of 117849161 in words is "one hundred seventeen million, eight hundred forty-nine thousand, one hundred sixty-one".