199919149 has 2 divisors, whose sum is σ = 199919150. Its totient is φ = 199919148.

The previous prime is 199919129. The next prime is 199919171. The reversal of 199919149 is 941919991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192709924 + 7209225 = 13882^2 + 2685^2 .

It is a cyclic number.

It is not a de Polignac number, because 199919149 - 2⁵ = 199919117 is a prime.

It is a super-2 number, since 2×199919149² = 79935332273768402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199919096 and 199919105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199919119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99959574 + 99959575.

It is an arithmetic number, because the mean of its divisors is an integer number (99959575).

Almost surely, 2^199919149 is an apocalyptic number.

It is an amenable number.

199919149 is a deficient number, since it is larger than the sum of its proper divisors (1).

199919149 is an equidigital number, since it uses as much as digits as its factorization.

199919149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 236196, while the sum is 52.

The square root of 199919149 is about 14139.2768202621. The cubic root of 199919149 is about 584.7247337686.

The spelling of 199919149 in words is "one hundred ninety-nine million, nine hundred nineteen thousand, one hundred forty-nine".