108170992991 has 2 divisors, whose sum is σ = 108170992992. Its totient is φ = 108170992990.

The previous prime is 108170992967. The next prime is 108170992997. The reversal of 108170992991 is 199299071801.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 108170992991 - 2¹⁰ = 108170991967 is a prime.

It is a super-2 number, since 2×108170992991² (a number of 23 digits) contains 22 as substring.

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 (108170992997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54085496495 + 54085496496.

It is an arithmetic number, because the mean of its divisors is an integer number (54085496496).

Almost surely, 2^108170992991 is an apocalyptic number.

108170992991 is a deficient number, since it is larger than the sum of its proper divisors (1).

108170992991 is an equidigital number, since it uses as much as digits as its factorization.

108170992991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 734832, while the sum is 56.

The spelling of 108170992991 in words is "one hundred eight billion, one hundred seventy million, nine hundred ninety-two thousand, nine hundred ninety-one".