199371493 has 2 divisors, whose sum is σ = 199371494. Its totient is φ = 199371492.

The previous prime is 199371457. The next prime is 199371499. The reversal of 199371493 is 394173991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159213924 + 40157569 = 12618^2 + 6337^2 .

It is a cyclic number.

It is not a de Polignac number, because 199371493 - 2⁹ = 199370981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199371499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99685746 + 99685747.

It is an arithmetic number, because the mean of its divisors is an integer number (99685747).

Almost surely, 2^199371493 is an apocalyptic number.

It is an amenable number.

199371493 is a deficient number, since it is larger than the sum of its proper divisors (1).

199371493 is an equidigital number, since it uses as much as digits as its factorization.

199371493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 183708, while the sum is 46.

The square root of 199371493 is about 14119.8970605313. The cubic root of 199371493 is about 584.1903162874.

The spelling of 199371493 in words is "one hundred ninety-nine million, three hundred seventy-one thousand, four hundred ninety-three".