116431391 has 2 divisors, whose sum is σ = 116431392. Its totient is φ = 116431390.

The previous prime is 116431387. The next prime is 116431421. The reversal of 116431391 is 193134611.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 116431391 - 2² = 116431387 is a prime.

It is a Sophie Germain 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 (116431291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58215695 + 58215696.

It is an arithmetic number, because the mean of its divisors is an integer number (58215696).

Almost surely, 2^116431391 is an apocalyptic number.

116431391 is a deficient number, since it is larger than the sum of its proper divisors (1).

116431391 is an equidigital number, since it uses as much as digits as its factorization.

116431391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1944, while the sum is 29.

The square root of 116431391 is about 10790.3378538394. The cubic root of 116431391 is about 488.3037152987.

The spelling of 116431391 in words is "one hundred sixteen million, four hundred thirty-one thousand, three hundred ninety-one".