199504913 has 2 divisors, whose sum is σ = 199504914. Its totient is φ = 199504912.

The previous prime is 199504909. The next prime is 199504919. The reversal of 199504913 is 319405991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174424849 + 25080064 = 13207^2 + 5008^2 .

It is a cyclic number.

It is not a de Polignac number, because 199504913 - 2² = 199504909 is a prime.

It is a super-2 number, since 2×199504913² = 79604420622275138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199504919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99752456 + 99752457.

It is an arithmetic number, because the mean of its divisors is an integer number (99752457).

Almost surely, 2^199504913 is an apocalyptic number.

It is an amenable number.

199504913 is a deficient number, since it is larger than the sum of its proper divisors (1).

199504913 is an equidigital number, since it uses as much as digits as its factorization.

199504913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43740, while the sum is 41.

The square root of 199504913 is about 14124.6208090695. The cubic root of 199504913 is about 584.3206011989.

The spelling of 199504913 in words is "one hundred ninety-nine million, five hundred four thousand, nine hundred thirteen".