194942719 has 2 divisors, whose sum is σ = 194942720. Its totient is φ = 194942718.

The previous prime is 194942653. The next prime is 194942747. The reversal of 194942719 is 917249491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194942719 - 2¹¹ = 194940671 is a prime.

It is a super-2 number, since 2×194942719² = 76005327382225922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194942749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97471359 + 97471360.

It is an arithmetic number, because the mean of its divisors is an integer number (97471360).

Almost surely, 2^194942719 is an apocalyptic number.

194942719 is a deficient number, since it is larger than the sum of its proper divisors (1).

194942719 is an equidigital number, since it uses as much as digits as its factorization.

194942719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 194942719 is about 13962.1889043230. The cubic root of 194942719 is about 579.8322136542.

The spelling of 194942719 in words is "one hundred ninety-four million, nine hundred forty-two thousand, seven hundred nineteen".