195490849 has 2 divisors, whose sum is σ = 195490850. Its totient is φ = 195490848.

The previous prime is 195490843. The next prime is 195490859. The reversal of 195490849 is 948094591.

It is a happy number.

195490849 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., 187690000 + 7800849 = 13700^2 + 2793^2 .

It is a cyclic number.

It is not a de Polignac number, because 195490849 - 2⁵ = 195490817 is a prime.

It is not a weakly prime, because it can be changed into another prime (195490843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97745424 + 97745425.

It is an arithmetic number, because the mean of its divisors is an integer number (97745425).

Almost surely, 2^195490849 is an apocalyptic number.

It is an amenable number.

195490849 is a deficient number, since it is larger than the sum of its proper divisors (1).

195490849 is an equidigital number, since it uses as much as digits as its factorization.

195490849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 195490849 is about 13981.8042111882. The cubic root of 195490849 is about 580.3751526560.

The spelling of 195490849 in words is "one hundred ninety-five million, four hundred ninety thousand, eight hundred forty-nine".