117731077 has 4 divisors (see below), whose sum is σ = 120913036. Its totient is φ = 114549120.

The previous prime is 117731051. The next prime is 117731189. The reversal of 117731077 is 770137711.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770137711 = 7 ⋅110019673.

It can be written as a sum of positive squares in 2 ways, for example, as 106481761 + 11249316 = 10319^2 + 3354^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117731077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117731017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1590924 + ... + 1590997.

It is an arithmetic number, because the mean of its divisors is an integer number (30228259).

Almost surely, 2^117731077 is an apocalyptic number.

It is an amenable number.

117731077 is a deficient number, since it is larger than the sum of its proper divisors (3181959).

117731077 is an equidigital number, since it uses as much as digits as its factorization.

117731077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3181958.

The product of its (nonzero) digits is 7203, while the sum is 34.

The square root of 117731077 is about 10850.3952462572. The cubic root of 117731077 is about 490.1139218667.

Adding to 117731077 its reverse (770137711), we get a palindrome (887868788).

The spelling of 117731077 in words is "one hundred seventeen million, seven hundred thirty-one thousand, seventy-seven".