117007781 has 8 divisors (see below), whose sum is σ = 127763328. Its totient is φ = 106272000.

The previous prime is 117007777. The next prime is 117007789. The reversal of 117007781 is 187700711.

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 117007781 - 2² = 117007777 is a prime.

It is a super-2 number, since 2×117007781² = 27381641629087922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117007789) 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, 9221 + ... + 17861.

It is an arithmetic number, because the mean of its divisors is an integer number (15970416).

Almost surely, 2^117007781 is an apocalyptic number.

117007781 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

117007781 is a deficient number, since it is larger than the sum of its proper divisors (10755547).

117007781 is a wasteful number, since it uses less digits than its factorization.

117007781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9883.

The product of its (nonzero) digits is 2744, while the sum is 32.

The square root of 117007781 is about 10817.0134972644. The cubic root of 117007781 is about 489.1081667646.

The spelling of 117007781 in words is "one hundred seventeen million, seven thousand, seven hundred eighty-one".