117770287 has 4 divisors (see below), whose sum is σ = 118026216. Its totient is φ = 117514360.

The previous prime is 117770273. The next prime is 117770291. The reversal of 117770287 is 782077711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782077711 = 6367 ⋅122833.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117770287 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117770207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127273 + ... + 128194.

It is an arithmetic number, because the mean of its divisors is an integer number (29506554).

Almost surely, 2^117770287 is an apocalyptic number.

117770287 is a deficient number, since it is larger than the sum of its proper divisors (255929).

117770287 is an equidigital number, since it uses as much as digits as its factorization.

117770287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255928.

The product of its (nonzero) digits is 38416, while the sum is 40.

The square root of 117770287 is about 10852.2019424631. The cubic root of 117770287 is about 490.1683261762.

The spelling of 117770287 in words is "one hundred seventeen million, seven hundred seventy thousand, two hundred eighty-seven".