117940261 has 4 divisors (see below), whose sum is σ = 119361312. Its totient is φ = 116519212.

The previous prime is 117940241. The next prime is 117940279. The reversal of 117940261 is 162049711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 162049711 = 2269 ⋅71419.

It is a cyclic number.

It is not a de Polignac number, because 117940261 - 2¹⁹ = 117415973 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 (117940241) 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, 710401 + ... + 710566.

It is an arithmetic number, because the mean of its divisors is an integer number (29840328).

Almost surely, 2^117940261 is an apocalyptic number.

It is an amenable number.

117940261 is a deficient number, since it is larger than the sum of its proper divisors (1421051).

117940261 is an equidigital number, since it uses as much as digits as its factorization.

117940261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421050.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 117940261 is about 10860.0304327382. The cubic root of 117940261 is about 490.4040274523.

Adding to 117940261 its reverse (162049711), we get a palindrome (279989972).

The spelling of 117940261 in words is "one hundred seventeen million, nine hundred forty thousand, two hundred sixty-one".