199393949 has 2 divisors, whose sum is σ = 199393950. Its totient is φ = 199393948.

The previous prime is 199393919. The next prime is 199393991. The reversal of 199393949 is 949393991.

It is a happy number.

199393949 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., 167832025 + 31561924 = 12955^2 + 5618^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199393949 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 199393894 and 199393903.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199393919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99696974 + 99696975.

It is an arithmetic number, because the mean of its divisors is an integer number (99696975).

Almost surely, 2^199393949 is an apocalyptic number.

It is an amenable number.

199393949 is a deficient number, since it is larger than the sum of its proper divisors (1).

199393949 is an equidigital number, since it uses as much as digits as its factorization.

199393949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2125764, while the sum is 56.

The square root of 199393949 is about 14120.6922280744. The cubic root of 199393949 is about 584.2122486861.

The spelling of 199393949 in words is "one hundred ninety-nine million, three hundred ninety-three thousand, nine hundred forty-nine".