117889427 has 2 divisors, whose sum is σ = 117889428. Its totient is φ = 117889426.

The previous prime is 117889417. The next prime is 117889469. The reversal of 117889427 is 724988711.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117889427 - 2¹⁰ = 117888403 is a prime.

It is not a weakly prime, because it can be changed into another prime (117889417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58944713 + 58944714.

It is an arithmetic number, because the mean of its divisors is an integer number (58944714).

Almost surely, 2^117889427 is an apocalyptic number.

117889427 is a deficient number, since it is larger than the sum of its proper divisors (1).

117889427 is an equidigital number, since it uses as much as digits as its factorization.

117889427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 47.

The square root of 117889427 is about 10857.6897634810. The cubic root of 117889427 is about 490.3335601932. Note that the first 3 decimals are identical.

The spelling of 117889427 in words is "one hundred seventeen million, eight hundred eighty-nine thousand, four hundred twenty-seven".