199406503 has 2 divisors, whose sum is σ = 199406504. Its totient is φ = 199406502.

The previous prime is 199406491. The next prime is 199406513. The reversal of 199406503 is 305604991.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199406503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199406513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99703251 + 99703252.

It is an arithmetic number, because the mean of its divisors is an integer number (99703252).

Almost surely, 2^199406503 is an apocalyptic number.

199406503 is a deficient number, since it is larger than the sum of its proper divisors (1).

199406503 is an equidigital number, since it uses as much as digits as its factorization.

199406503 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 29160, while the sum is 37.

The square root of 199406503 is about 14121.1367460272. The cubic root of 199406503 is about 584.2245092499.

The spelling of 199406503 in words is "one hundred ninety-nine million, four hundred six thousand, five hundred three".