1065878091 has 12 divisors (see below), whose sum is σ = 1544174632. Its totient is φ = 708474816.

The previous prime is 1065878089. The next prime is 1065878111. The reversal of 1065878091 is 1908785601.

It is not a de Polignac number, because 1065878091 - 2¹ = 1065878089 is a prime.

It is a super-2 number, since 2×1065878091² = 2272192209747608562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1065878041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 172681 + ... + 178746.

Almost surely, 2^1065878091 is an apocalyptic number.

1065878091 is a deficient number, since it is larger than the sum of its proper divisors (478296541).

1065878091 is a wasteful number, since it uses less digits than its factorization.

1065878091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351770 (or 351767 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 1065878091 is about 32647.7884549628. The cubic root of 1065878091 is about 1021.4940590462.

The spelling of 1065878091 in words is "one billion, sixty-five million, eight hundred seventy-eight thousand, ninety-one".