1065939813 has 6 divisors (see below), whose sum is σ = 1539690854. Its totient is φ = 710626536.

The previous prime is 1065939781. The next prime is 1065939821. The reversal of 1065939813 is 3189395601.

It can be written as a sum of positive squares in only one way, i.e., 636704289 + 429235524 = 25233^2 + 20718^2 .

It is not a de Polignac number, because 1065939813 - 2⁵ = 1065939781 is a prime.

It is a super-2 number, since 2×1065939813² = 2272455369876949938, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065939883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59218870 + ... + 59218887.

Almost surely, 2^1065939813 is an apocalyptic number.

It is an amenable number.

1065939813 is a deficient number, since it is larger than the sum of its proper divisors (473751041).

1065939813 is a wasteful number, since it uses less digits than its factorization.

1065939813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118437763 (or 118437760 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 1065939813 is about 32648.7337120446. The cubic root of 1065939813 is about 1021.5137759475.

The spelling of 1065939813 in words is "one billion, sixty-five million, nine hundred thirty-nine thousand, eight hundred thirteen".