254066191 has 2 divisors, whose sum is σ = 254066192. Its totient is φ = 254066190.

The previous prime is 254066179. The next prime is 254066209. The reversal of 254066191 is 191660452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 254066191 - 2⁷ = 254066063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (254066101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127033095 + 127033096.

It is an arithmetic number, because the mean of its divisors is an integer number (127033096).

Almost surely, 2^254066191 is an apocalyptic number.

254066191 is a deficient number, since it is larger than the sum of its proper divisors (1).

254066191 is an equidigital number, since it uses as much as digits as its factorization.

254066191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 254066191 is about 15939.4539115994. The cubic root of 254066191 is about 633.3575600766.

The spelling of 254066191 in words is "two hundred fifty-four million, sixty-six thousand, one hundred ninety-one".