117987983 has 2 divisors, whose sum is σ = 117987984. Its totient is φ = 117987982.

The previous prime is 117987949. The next prime is 117988021. The reversal of 117987983 is 389789711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117987983 - 2¹⁴ = 117971599 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117987943) 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, 58993991 + 58993992.

It is an arithmetic number, because the mean of its divisors is an integer number (58993992).

Almost surely, 2^117987983 is an apocalyptic number.

117987983 is a deficient number, since it is larger than the sum of its proper divisors (1).

117987983 is an equidigital number, since it uses as much as digits as its factorization.

117987983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 762048, while the sum is 53.

The square root of 117987983 is about 10862.2273498579. The cubic root of 117987983 is about 490.4701623611.

The spelling of 117987983 in words is "one hundred seventeen million, nine hundred eighty-seven thousand, nine hundred eighty-three".