194239663 has 2 divisors, whose sum is σ = 194239664. Its totient is φ = 194239662.

The previous prime is 194239649. The next prime is 194239667. The reversal of 194239663 is 366932491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194239663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194239667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97119831 + 97119832.

It is an arithmetic number, because the mean of its divisors is an integer number (97119832).

Almost surely, 2^194239663 is an apocalyptic number.

194239663 is a deficient number, since it is larger than the sum of its proper divisors (1).

194239663 is an equidigital number, since it uses as much as digits as its factorization.

194239663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 43.

The square root of 194239663 is about 13936.9890220234. The cubic root of 194239663 is about 579.1343239212.

The spelling of 194239663 in words is "one hundred ninety-four million, two hundred thirty-nine thousand, six hundred sixty-three".