117051781 has 8 divisors (see below), whose sum is σ = 145934784. Its totient is φ = 91209120.

The previous prime is 117051773. The next prime is 117051787. The reversal of 117051781 is 187150711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 117051781 - 2³ = 117051773 is a prime.

It is a super-2 number, since 2×117051781² = 27402238870543922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117051787) 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 7 ways as a sum of consecutive naturals, for example, 760000 + ... + 760153.

It is an arithmetic number, because the mean of its divisors is an integer number (18241848).

Almost surely, 2^117051781 is an apocalyptic number.

117051781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117051781 is a deficient number, since it is larger than the sum of its proper divisors (28883003).

117051781 is a wasteful number, since it uses less digits than its factorization.

117051781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520171.

The product of its (nonzero) digits is 1960, while the sum is 31.

The square root of 117051781 is about 10819.0471391893. The cubic root of 117051781 is about 489.1694677087.

The spelling of 117051781 in words is "one hundred seventeen million, fifty-one thousand, seven hundred eighty-one".