199994623 has 2 divisors, whose sum is σ = 199994624. Its totient is φ = 199994622.

The previous prime is 199994603. The next prime is 199994629. The reversal of 199994623 is 326499991.

It is a strong prime.

It is an emirp because it is prime and its reverse (326499991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199994623 - 2¹³ = 199986431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199994629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99997311 + 99997312.

It is an arithmetic number, because the mean of its divisors is an integer number (99997312).

Almost surely, 2^199994623 is an apocalyptic number.

199994623 is a deficient number, since it is larger than the sum of its proper divisors (1).

199994623 is an equidigital number, since it uses as much as digits as its factorization.

199994623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 944784, while the sum is 52.

The square root of 199994623 is about 14141.9455167951. The cubic root of 199994623 is about 584.7983067811.

The spelling of 199994623 in words is "one hundred ninety-nine million, nine hundred ninety-four thousand, six hundred twenty-three".