1836379609 has 3 divisors (see below), whose sum is σ = 1836422463. Its totient is φ = 1836336756.

The previous prime is 1836379513. The next prime is 1836379613. The reversal of 1836379609 is 9069736381.

The square root of 1836379609 is 42853.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1835694025 + 685584 = 42845^2 + 828^2 .

It is not a de Polignac number, because 1836379609 - 2¹⁷ = 1836248537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1836379619) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 21427 + ... + 64279.

It is an arithmetic number, because the mean of its divisors is an integer number (612140821).

Almost surely, 2^1836379609 is an apocalyptic number.

1836379609 is the 42853-rd square number.

1836379609 is the 21427-th centered octagonal number.

It is an amenable number.

1836379609 is a deficient number, since it is larger than the sum of its proper divisors (42854).

1836379609 is an frugal number, since it uses more digits than its factorization.

1836379609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85706 (or 42853 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 52.

The cubic root of 1836379609 is about 1224.5809165359.

The spelling of 1836379609 in words is "one billion, eight hundred thirty-six million, three hundred seventy-nine thousand, six hundred nine".