190747409 has 2 divisors, whose sum is σ = 190747410. Its totient is φ = 190747408.

The previous prime is 190747399. The next prime is 190747423. The reversal of 190747409 is 904747091.

It is a happy number.

190747409 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., 178810384 + 11937025 = 13372^2 + 3455^2 .

It is an emirp because it is prime and its reverse (904747091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 190747409 - 2²⁰ = 189698833 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (190747439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95373704 + 95373705.

It is an arithmetic number, because the mean of its divisors is an integer number (95373705).

Almost surely, 2^190747409 is an apocalyptic number.

It is an amenable number.

190747409 is a deficient number, since it is larger than the sum of its proper divisors (1).

190747409 is an equidigital number, since it uses as much as digits as its factorization.

190747409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 190747409 is about 13811.1335161166. The cubic root of 190747409 is about 575.6425422058.

The spelling of 190747409 in words is "one hundred ninety million, seven hundred forty-seven thousand, four hundred nine".