117851751 has 6 divisors (see below), whose sum is σ = 170230320. Its totient is φ = 78567828.

The previous prime is 117851743. The next prime is 117851761. The reversal of 117851751 is 157158711.

It is not a de Polignac number, because 117851751 - 2³ = 117851743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117851761) 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 in 5 ways as a sum of consecutive naturals, for example, 6547311 + ... + 6547328.

It is an arithmetic number, because the mean of its divisors is an integer number (28371720).

Almost surely, 2^117851751 is an apocalyptic number.

117851751 is a deficient number, since it is larger than the sum of its proper divisors (52378569).

117851751 is a wasteful number, since it uses less digits than its factorization.

117851751 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13094645 (or 13094642 counting only the distinct ones).

The product of its digits is 9800, while the sum is 36.

The square root of 117851751 is about 10855.9546332877. The cubic root of 117851751 is about 490.2813197844.

The spelling of 117851751 in words is "one hundred seventeen million, eight hundred fifty-one thousand, seven hundred fifty-one".