199180049 has 2 divisors, whose sum is σ = 199180050. Its totient is φ = 199180048.

The previous prime is 199180043. The next prime is 199180081. The reversal of 199180049 is 940081991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177955600 + 21224449 = 13340^2 + 4607^2 .

It is a cyclic number.

It is not a de Polignac number, because 199180049 - 2¹² = 199175953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199179988 and 199180015.

It is not a weakly prime, because it can be changed into another prime (199180043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99590024 + 99590025.

It is an arithmetic number, because the mean of its divisors is an integer number (99590025).

Almost surely, 2^199180049 is an apocalyptic number.

It is an amenable number.

199180049 is a deficient number, since it is larger than the sum of its proper divisors (1).

199180049 is an equidigital number, since it uses as much as digits as its factorization.

199180049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 199180049 is about 14113.1162044390. The cubic root of 199180049 is about 584.0032692395.

The spelling of 199180049 in words is "one hundred ninety-nine million, one hundred eighty thousand, forty-nine".