199912513 has 2 divisors, whose sum is σ = 199912514. Its totient is φ = 199912512.

The previous prime is 199912507. The next prime is 199912529. The reversal of 199912513 is 315219991.

199912513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 198443569 + 1468944 = 14087^2 + 1212^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199912513 is a prime.

It is not a weakly prime, because it can be changed into another prime (199912543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99956256 + 99956257.

It is an arithmetic number, because the mean of its divisors is an integer number (99956257).

Almost surely, 2^199912513 is an apocalyptic number.

It is an amenable number.

199912513 is a deficient number, since it is larger than the sum of its proper divisors (1).

199912513 is an equidigital number, since it uses as much as digits as its factorization.

199912513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 40.

The square root of 199912513 is about 14139.0421528476. The cubic root of 199912513 is about 584.7182640261.

The spelling of 199912513 in words is "one hundred ninety-nine million, nine hundred twelve thousand, five hundred thirteen".