194194657 has 2 divisors, whose sum is σ = 194194658. Its totient is φ = 194194656.

The previous prime is 194194639. The next prime is 194194669. The reversal of 194194657 is 756491491.

194194657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108243216 + 85951441 = 10404^2 + 9271^2 .

It is a cyclic number.

It is not a de Polignac number, because 194194657 - 2¹⁵ = 194161889 is a prime.

It is a super-3 number, since 3×194194657³ (a number of 26 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (194194697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97097328 + 97097329.

It is an arithmetic number, because the mean of its divisors is an integer number (97097329).

Almost surely, 2^194194657 is an apocalyptic number.

It is an amenable number.

194194657 is a deficient number, since it is larger than the sum of its proper divisors (1).

194194657 is an equidigital number, since it uses as much as digits as its factorization.

194194657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 194194657 is about 13935.3743042661. The cubic root of 194194657 is about 579.0895913259.

The spelling of 194194657 in words is "one hundred ninety-four million, one hundred ninety-four thousand, six hundred fifty-seven".