117285409 has 2 divisors, whose sum is σ = 117285410. Its totient is φ = 117285408.

The previous prime is 117285407. The next prime is 117285457. The reversal of 117285409 is 904582711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107848225 + 9437184 = 10385^2 + 3072^2 .

It is a cyclic number.

It is not a de Polignac number, because 117285409 - 2¹ = 117285407 is a prime.

Together with 117285407, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117285407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58642704 + 58642705.

It is an arithmetic number, because the mean of its divisors is an integer number (58642705).

Almost surely, 2^117285409 is an apocalyptic number.

It is an amenable number.

117285409 is a deficient number, since it is larger than the sum of its proper divisors (1).

117285409 is an equidigital number, since it uses as much as digits as its factorization.

117285409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 117285409 is about 10829.8388261322. The cubic root of 117285409 is about 489.4947019292.

The spelling of 117285409 in words is "one hundred seventeen million, two hundred eighty-five thousand, four hundred nine".