117619409 has 2 divisors, whose sum is σ = 117619410. Its totient is φ = 117619408.

The previous prime is 117619373. The next prime is 117619421. The reversal of 117619409 is 904916711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76300225 + 41319184 = 8735^2 + 6428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117619409 is a prime.

It is not a weakly prime, because it can be changed into another prime (117619499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58809704 + 58809705.

It is an arithmetic number, because the mean of its divisors is an integer number (58809705).

Almost surely, 2^117619409 is an apocalyptic number.

It is an amenable number.

117619409 is a deficient number, since it is larger than the sum of its proper divisors (1).

117619409 is an equidigital number, since it uses as much as digits as its factorization.

117619409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 117619409 is about 10845.2482221478. The cubic root of 117619409 is about 489.9589150614.

The spelling of 117619409 in words is "one hundred seventeen million, six hundred nineteen thousand, four hundred nine".