117281869 has 2 divisors, whose sum is σ = 117281870. Its totient is φ = 117281868.

The previous prime is 117281867. The next prime is 117281881. The reversal of 117281869 is 968182711.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73324969 + 43956900 = 8563^2 + 6630^2 .

It is a cyclic number.

It is not a de Polignac number, because 117281869 - 2¹ = 117281867 is a prime.

It is a super-2 number, since 2×117281869² = 27510073592266322, which contains 22 as substring.

Together with 117281867, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117281863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58640934 + 58640935.

It is an arithmetic number, because the mean of its divisors is an integer number (58640935).

Almost surely, 2^117281869 is an apocalyptic number.

It is an amenable number.

117281869 is a deficient number, since it is larger than the sum of its proper divisors (1).

117281869 is an equidigital number, since it uses as much as digits as its factorization.

117281869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 43.

The square root of 117281869 is about 10829.6753875636. The cubic root of 117281869 is about 489.4897771089.

The spelling of 117281869 in words is "one hundred seventeen million, two hundred eighty-one thousand, eight hundred sixty-nine".