117840091 has 2 divisors, whose sum is σ = 117840092. Its totient is φ = 117840090.

The previous prime is 117840029. The next prime is 117840119. The reversal of 117840091 is 190048711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117840091 - 2¹¹ = 117838043 is a prime.

It is not a weakly prime, because it can be changed into another prime (117840011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58920045 + 58920046.

It is an arithmetic number, because the mean of its divisors is an integer number (58920046).

Almost surely, 2^117840091 is an apocalyptic number.

117840091 is a deficient number, since it is larger than the sum of its proper divisors (1).

117840091 is an equidigital number, since it uses as much as digits as its factorization.

117840091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 31.

The square root of 117840091 is about 10855.4175875459. The cubic root of 117840091 is about 490.2651501230.

The spelling of 117840091 in words is "one hundred seventeen million, eight hundred forty thousand, ninety-one".