190268809 has 2 divisors, whose sum is σ = 190268810. Its totient is φ = 190268808.

The previous prime is 190268803. The next prime is 190268833. The reversal of 190268809 is 908862091.

It is a happy number.

190268809 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., 158684409 + 31584400 = 12597^2 + 5620^2 .

It is a cyclic number.

It is not a de Polignac number, because 190268809 - 2³ = 190268801 is a prime.

It is not a weakly prime, because it can be changed into another prime (190268801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95134404 + 95134405.

It is an arithmetic number, because the mean of its divisors is an integer number (95134405).

Almost surely, 2^190268809 is an apocalyptic number.

It is an amenable number.

190268809 is a deficient number, since it is larger than the sum of its proper divisors (1).

190268809 is an equidigital number, since it uses as much as digits as its factorization.

190268809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 190268809 is about 13793.7960329998. The cubic root of 190268809 is about 575.1606950990.

The spelling of 190268809 in words is "one hundred ninety million, two hundred sixty-eight thousand, eight hundred nine".