117990261979 has 2 divisors, whose sum is σ = 117990261980. Its totient is φ = 117990261978.

The previous prime is 117990261971. The next prime is 117990261989. The reversal of 117990261979 is 979162099711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117990261979 - 2³ = 117990261971 is a prime.

It is not a weakly prime, because it can be changed into another prime (117990261971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58995130989 + 58995130990.

It is an arithmetic number, because the mean of its divisors is an integer number (58995130990).

Almost surely, 2^117990261979 is an apocalyptic number.

117990261979 is a deficient number, since it is larger than the sum of its proper divisors (1).

117990261979 is an equidigital number, since it uses as much as digits as its factorization.

117990261979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3857868, while the sum is 61.

The spelling of 117990261979 in words is "one hundred seventeen billion, nine hundred ninety million, two hundred sixty-one thousand, nine hundred seventy-nine".