117881399 has 2 divisors, whose sum is σ = 117881400. Its totient is φ = 117881398.

The previous prime is 117881389. The next prime is 117881411. The reversal of 117881399 is 993188711.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117881399 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117881329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58940699 + 58940700.

It is an arithmetic number, because the mean of its divisors is an integer number (58940700).

Almost surely, 2^117881399 is an apocalyptic number.

117881399 is a deficient number, since it is larger than the sum of its proper divisors (1).

117881399 is an equidigital number, since it uses as much as digits as its factorization.

117881399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 47.

The square root of 117881399 is about 10857.3200652831. The cubic root of 117881399 is about 490.3224297430.

The spelling of 117881399 in words is "one hundred seventeen million, eight hundred eighty-one thousand, three hundred ninety-nine".