117780745 has 8 divisors (see below), whose sum is σ = 146210760. Its totient is φ = 90975360.

The previous prime is 117780739. The next prime is 117780757. The reversal of 117780745 is 547087711.

It can be written as a sum of positive squares in 4 ways, for example, as 25563136 + 92217609 = 5056^2 + 9603^2 .

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

It is not a de Polignac number, because 117780745 - 2⁷ = 117780617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 117780698 and 117780707.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405996 + ... + 406285.

It is an arithmetic number, because the mean of its divisors is an integer number (18276345).

Almost surely, 2^117780745 is an apocalyptic number.

It is an amenable number.

117780745 is a deficient number, since it is larger than the sum of its proper divisors (28430015).

117780745 is an equidigital number, since it uses as much as digits as its factorization.

117780745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812315.

The product of its (nonzero) digits is 54880, while the sum is 40.

The square root of 117780745 is about 10852.6837694646. The cubic root of 117780745 is about 490.1828347271.

The spelling of 117780745 in words is "one hundred seventeen million, seven hundred eighty thousand, seven hundred forty-five".