194999998453999 has 2 divisors, whose sum is σ = 194999998454000. Its totient is φ = 194999998453998.

The previous prime is 194999998453969. The next prime is 194999998454033. The reversal of 194999998453999 is 999354899999491.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 194999998453999 - 2⁹ = 194999998453487 is a prime.

It is a super-2 number, since 2×194999998453999² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (194999998453969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97499999226999 + 97499999227000.

It is an arithmetic number, because the mean of its divisors is an integer number (97499999227000).

Almost surely, 2^{194999998453999} is an apocalyptic number.

194999998453999 is a deficient number, since it is larger than the sum of its proper divisors (1).

194999998453999 is an equidigital number, since it uses as much as digits as its factorization.

194999998453999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 743847338880, while the sum is 106.

The spelling of 194999998453999 in words is "one hundred ninety-four trillion, nine hundred ninety-nine billion, nine hundred ninety-eight million, four hundred fifty-three thousand, nine hundred ninety-nine".