117239989 has 2 divisors, whose sum is σ = 117239990. Its totient is φ = 117239988.

The previous prime is 117239977. The next prime is 117239999. The reversal of 117239989 is 989932711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96236100 + 21003889 = 9810^2 + 4583^2 .

It is a cyclic number.

It is not a de Polignac number, because 117239989 - 2⁹ = 117239477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117239909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58619994 + 58619995.

It is an arithmetic number, because the mean of its divisors is an integer number (58619995).

Almost surely, 2^117239989 is an apocalyptic number.

It is an amenable number.

117239989 is a deficient number, since it is larger than the sum of its proper divisors (1).

117239989 is an equidigital number, since it uses as much as digits as its factorization.

117239989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 117239989 is about 10827.7416389569. The cubic root of 117239989 is about 489.4315064583.

It can be divided in two parts, 11723 and 9989, that added together give a palindrome (21712).

The spelling of 117239989 in words is "one hundred seventeen million, two hundred thirty-nine thousand, nine hundred eighty-nine".