117808451 has 2 divisors, whose sum is σ = 117808452. Its totient is φ = 117808450.

The previous prime is 117808441. The next prime is 117808459. The reversal of 117808451 is 154808711.

It is a strong prime.

It is an emirp because it is prime and its reverse (154808711) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117808451 is a prime.

It is a super-2 number, since 2×117808451² = 27757662254038802, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (117808459) 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, 58904225 + 58904226.

It is an arithmetic number, because the mean of its divisors is an integer number (58904226).

Almost surely, 2^117808451 is an apocalyptic number.

117808451 is a deficient number, since it is larger than the sum of its proper divisors (1).

117808451 is an equidigital number, since it uses as much as digits as its factorization.

117808451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 35.

The square root of 117808451 is about 10853.9601528659. The cubic root of 117808451 is about 490.2212675537.

The spelling of 117808451 in words is "one hundred seventeen million, eight hundred eight thousand, four hundred fifty-one".