117110781 has 6 divisors (see below), whose sum is σ = 169160030. Its totient is φ = 78073848.

The previous prime is 117110771. The next prime is 117110821. The reversal of 117110781 is 187011711.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 98188281 + 18922500 = 9909^2 + 4350^2 .

It is not a de Polignac number, because 117110781 - 2¹³ = 117102589 is a prime.

It is a super-2 number, since 2×117110781² = 27429870052859922, 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 (117110701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6506146 + ... + 6506163.

Almost surely, 2^117110781 is an apocalyptic number.

It is an amenable number.

117110781 is a deficient number, since it is larger than the sum of its proper divisors (52049249).

117110781 is a wasteful number, since it uses less digits than its factorization.

117110781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13012315 (or 13012312 counting only the distinct ones).

The product of its (nonzero) digits is 392, while the sum is 27.

The square root of 117110781 is about 10821.7734683369. The cubic root of 117110781 is about 489.2516425962.

The spelling of 117110781 in words is "one hundred seventeen million, one hundred ten thousand, seven hundred eighty-one".