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19000000091 is a prime number
BaseRepresentation
bin10001101100011111…
…001111111001011011
31211001010212000021002
4101230133033321123
5302403000000331
612421203535215
71241560223162
oct215437177133
954033760232
1019000000091
118070006316
12382308a50b
131a3a46a807
14cc35783d9
157630899cb
hex46c7cfe5b

19000000091 has 2 divisors, whose sum is σ = 19000000092. Its totient is φ = 19000000090.

The previous prime is 19000000079. The next prime is 19000000121.

19000000091 is nontrivially palindromic in base 10.

It is a weak prime.

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 19000000091 - 230 = 17926258267 is a prime.

It is a super-2 number, since 2×190000000912 (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19000000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9500000045 + 9500000046.

It is an arithmetic number, because the mean of its divisors is an integer number (9500000046).

Almost surely, 219000000091 is an apocalyptic number.

19000000091 is a deficient number, since it is larger than the sum of its proper divisors (1).

19000000091 is an equidigital number, since it uses as much as digits as its factorization.

19000000091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

It can be divided in two parts, 190000000 and 91, that added together give a palindrome (190000091).

The spelling of 19000000091 in words is "nineteen billion, ninety-one", and thus it is an aban number and an uban number.