194117969 has 2 divisors, whose sum is σ = 194117970. Its totient is φ = 194117968.

The previous prime is 194117897. The next prime is 194117971. The reversal of 194117969 is 969711491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 171269569 + 22848400 = 13087^2 + 4780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194117969 is a prime.

It is a super-2 number, since 2×194117969² = 75363571777369922, which contains 22 as substring.

Together with 194117971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (194117069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97058984 + 97058985.

It is an arithmetic number, because the mean of its divisors is an integer number (97058985).

Almost surely, 2^194117969 is an apocalyptic number.

It is an amenable number.

194117969 is a deficient number, since it is larger than the sum of its proper divisors (1).

194117969 is an equidigital number, since it uses as much as digits as its factorization.

194117969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 47.

The square root of 194117969 is about 13932.6224738920. The cubic root of 194117969 is about 579.0133532695.

The spelling of 194117969 in words is "one hundred ninety-four million, one hundred seventeen thousand, nine hundred sixty-nine".