117131861 has 8 divisors (see below), whose sum is σ = 146034624. Its totient is φ = 91271520.

The previous prime is 117131851. The next prime is 117131863. The reversal of 117131861 is 168131711.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117131861 is a prime.

It is a super-2 number, since 2×117131861² = 27439745722646642, 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 (117131863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 760520 + ... + 760673.

It is an arithmetic number, because the mean of its divisors is an integer number (18254328).

Almost surely, 2^117131861 is an apocalyptic number.

117131861 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117131861 is a deficient number, since it is larger than the sum of its proper divisors (28902763).

117131861 is a wasteful number, since it uses less digits than its factorization.

117131861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1521211.

The product of its digits is 1008, while the sum is 29.

The square root of 117131861 is about 10822.7473868699. The cubic root of 117131861 is about 489.2809960164.

The spelling of 117131861 in words is "one hundred seventeen million, one hundred thirty-one thousand, eight hundred sixty-one".