194945651 has 2 divisors, whose sum is σ = 194945652. Its totient is φ = 194945650.

The previous prime is 194945599. The next prime is 194945671. The reversal of 194945651 is 156549491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194945651 - 2⁶ = 194945587 is a prime.

It is not a weakly prime, because it can be changed into another prime (194945671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97472825 + 97472826.

It is an arithmetic number, because the mean of its divisors is an integer number (97472826).

Almost surely, 2^194945651 is an apocalyptic number.

194945651 is a deficient number, since it is larger than the sum of its proper divisors (1).

194945651 is an equidigital number, since it uses as much as digits as its factorization.

194945651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 44.

The square root of 194945651 is about 13962.2939017914. The cubic root of 194945651 is about 579.8351205927.

The spelling of 194945651 in words is "one hundred ninety-four million, nine hundred forty-five thousand, six hundred fifty-one".