199448429 has 2 divisors, whose sum is σ = 199448430. Its totient is φ = 199448428.

The previous prime is 199448363. The next prime is 199448489. The reversal of 199448429 is 924844991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109767529 + 89680900 = 10477^2 + 9470^2 .

It is a cyclic number.

It is not a de Polignac number, because 199448429 - 2⁸ = 199448173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199448489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99724214 + 99724215.

It is an arithmetic number, because the mean of its divisors is an integer number (99724215).

Almost surely, 2^199448429 is an apocalyptic number.

It is an amenable number.

199448429 is a deficient number, since it is larger than the sum of its proper divisors (1).

199448429 is an equidigital number, since it uses as much as digits as its factorization.

199448429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 50.

The square root of 199448429 is about 14122.6211802201. The cubic root of 199448429 is about 584.2654515460.

The spelling of 199448429 in words is "one hundred ninety-nine million, four hundred forty-eight thousand, four hundred twenty-nine".