191411009 has 2 divisors, whose sum is σ = 191411010. Its totient is φ = 191411008.

The previous prime is 191410993. The next prime is 191411023. The reversal of 191411009 is 900114191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190992400 + 418609 = 13820^2 + 647^2 .

It is an emirp because it is prime and its reverse (900114191) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 191411009 - 2⁴ = 191410993 is a prime.

It is not a weakly prime, because it can be changed into another prime (191411029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95705504 + 95705505.

It is an arithmetic number, because the mean of its divisors is an integer number (95705505).

Almost surely, 2^191411009 is an apocalyptic number.

It is an amenable number.

191411009 is a deficient number, since it is larger than the sum of its proper divisors (1).

191411009 is an equidigital number, since it uses as much as digits as its factorization.

191411009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 191411009 is about 13835.1367539320. The cubic root of 191411009 is about 576.3093127543.

The spelling of 191411009 in words is "one hundred ninety-one million, four hundred eleven thousand, nine".