117822409 has 2 divisors, whose sum is σ = 117822410. Its totient is φ = 117822408.

The previous prime is 117822407. The next prime is 117822433. The reversal of 117822409 is 904228711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62647225 + 55175184 = 7915^2 + 7428^2 .

It is a cyclic number.

It is not a de Polignac number, because 117822409 - 2¹ = 117822407 is a prime.

Together with 117822407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117822403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58911204 + 58911205.

It is an arithmetic number, because the mean of its divisors is an integer number (58911205).

Almost surely, 2^117822409 is an apocalyptic number.

It is an amenable number.

117822409 is a deficient number, since it is larger than the sum of its proper divisors (1).

117822409 is an equidigital number, since it uses as much as digits as its factorization.

117822409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 117822409 is about 10854.6031249420. The cubic root of 117822409 is about 490.2406273370.

The spelling of 117822409 in words is "one hundred seventeen million, eight hundred twenty-two thousand, four hundred nine".