783827161 has 4 divisors (see below), whose sum is σ = 844121572. Its totient is φ = 723532752.

The previous prime is 783827147. The next prime is 783827173. The reversal of 783827161 is 161728387.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156625225 + 627201936 = 12515^2 + 25044^2 .

It is a cyclic number.

It is not a de Polignac number, because 783827161 - 2¹⁵ = 783794393 is a prime.

It is a super-2 number, since 2×783827161² = 1228770036642639842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (783827101) 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, 30147186 + ... + 30147211.

It is an arithmetic number, because the mean of its divisors is an integer number (211030393).

Almost surely, 2^783827161 is an apocalyptic number.

It is an amenable number.

783827161 is a deficient number, since it is larger than the sum of its proper divisors (60294411).

783827161 is a wasteful number, since it uses less digits than its factorization.

783827161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60294410.

The product of its digits is 112896, while the sum is 43.

The square root of 783827161 is about 27996.9134191610. The cubic root of 783827161 is about 922.0194929556.

The spelling of 783827161 in words is "seven hundred eighty-three million, eight hundred twenty-seven thousand, one hundred sixty-one".