209094091 has 2 divisors, whose sum is σ = 209094092. Its totient is φ = 209094090.

The previous prime is 209094071. The next prime is 209094103. The reversal of 209094091 is 190490902.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 209094091 - 2⁵ = 209094059 is a prime.

It is a super-2 number, since 2×209094091² = 87440677782232562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (209094001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104547045 + 104547046.

It is an arithmetic number, because the mean of its divisors is an integer number (104547046).

Almost surely, 2^209094091 is an apocalyptic number.

209094091 is a deficient number, since it is larger than the sum of its proper divisors (1).

209094091 is an equidigital number, since it uses as much as digits as its factorization.

209094091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 209094091 is about 14460.0861339067. The cubic root of 209094091 is about 593.5362565672.

The spelling of 209094091 in words is "two hundred nine million, ninety-four thousand, ninety-one".