199523039 has 2 divisors, whose sum is σ = 199523040. Its totient is φ = 199523038.

The previous prime is 199522957. The next prime is 199523057. The reversal of 199523039 is 930325991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199523039 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199522987 and 199523005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199523059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99761519 + 99761520.

It is an arithmetic number, because the mean of its divisors is an integer number (99761520).

Almost surely, 2^199523039 is an apocalyptic number.

199523039 is a deficient number, since it is larger than the sum of its proper divisors (1).

199523039 is an equidigital number, since it uses as much as digits as its factorization.

199523039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 41.

The square root of 199523039 is about 14125.2624400398. The cubic root of 199523039 is about 584.3382967940.

The spelling of 199523039 in words is "one hundred ninety-nine million, five hundred twenty-three thousand, thirty-nine".