190006891 has 2 divisors, whose sum is σ = 190006892. Its totient is φ = 190006890.

The previous prime is 190006849. The next prime is 190006907. The reversal of 190006891 is 198600091.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 190006891 - 2¹⁵ = 189974123 is a prime.

It is a super-2 number, since 2×190006891² = 72205237254971762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190006391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95003445 + 95003446.

It is an arithmetic number, because the mean of its divisors is an integer number (95003446).

Almost surely, 2^190006891 is an apocalyptic number.

190006891 is a deficient number, since it is larger than the sum of its proper divisors (1).

190006891 is an equidigital number, since it uses as much as digits as its factorization.

190006891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 190006891 is about 13784.2987126658. The cubic root of 190006891 is about 574.8966579245.

The spelling of 190006891 in words is "one hundred ninety million, six thousand, eight hundred ninety-one".