194481899 has 2 divisors, whose sum is σ = 194481900. Its totient is φ = 194481898.

The previous prime is 194481893. The next prime is 194481907. The reversal of 194481899 is 998184491.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194481899 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194481899.

It is not a weakly prime, because it can be changed into another prime (194481893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97240949 + 97240950.

It is an arithmetic number, because the mean of its divisors is an integer number (97240950).

Almost surely, 2^194481899 is an apocalyptic number.

194481899 is a deficient number, since it is larger than the sum of its proper divisors (1).

194481899 is an equidigital number, since it uses as much as digits as its factorization.

194481899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 53.

The square root of 194481899 is about 13945.6767135912. The cubic root of 194481899 is about 579.3749697690.

The spelling of 194481899 in words is "one hundred ninety-four million, four hundred eighty-one thousand, eight hundred ninety-nine".