8169091019 has 4 divisors (see below), whose sum is σ = 8195700744. Its totient is φ = 8142481296.

The previous prime is 8169090913. The next prime is 8169091027. The reversal of 8169091019 is 9101909618.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9101909618 = 2 ⋅4550954809.

It is a cyclic number.

It is not a de Polignac number, because 8169091019 - 2⁸ = 8169090763 is a prime.

It is a super-2 number, since 2×8169091019² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8169091069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13304402 + ... + 13305015.

It is an arithmetic number, because the mean of its divisors is an integer number (2048925186).

Almost surely, 2^8169091019 is an apocalyptic number.

8169091019 is a deficient number, since it is larger than the sum of its proper divisors (26609725).

8169091019 is a wasteful number, since it uses less digits than its factorization.

8169091019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26609724.

The product of its (nonzero) digits is 34992, while the sum is 44.

The square root of 8169091019 is about 90383.0239536164. The cubic root of 8169091019 is about 2013.9927908387.

The spelling of 8169091019 in words is "eight billion, one hundred sixty-nine million, ninety-one thousand, nineteen".