117281881 has 2 divisors, whose sum is σ = 117281882. Its totient is φ = 117281880.

The previous prime is 117281869. The next prime is 117281903. The reversal of 117281881 is 188182711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114832656 + 2449225 = 10716^2 + 1565^2 .

It is a cyclic number.

It is not a de Polignac number, because 117281881 - 2⁵ = 117281849 is a prime.

It is a super-2 number, since 2×117281881² = 27510079221796322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117281881.

It is not a weakly prime, because it can be changed into another prime (117281981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58640940 + 58640941.

It is an arithmetic number, because the mean of its divisors is an integer number (58640941).

Almost surely, 2^117281881 is an apocalyptic number.

It is an amenable number.

117281881 is a deficient number, since it is larger than the sum of its proper divisors (1).

117281881 is an equidigital number, since it uses as much as digits as its factorization.

117281881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7168, while the sum is 37.

The square root of 117281881 is about 10829.6759415968. The cubic root of 117281881 is about 489.4897938034.

The spelling of 117281881 in words is "one hundred seventeen million, two hundred eighty-one thousand, eight hundred eighty-one".