3993860809 has 3 divisors (see below), whose sum is σ = 3993924007. Its totient is φ = 3993797612.

The previous prime is 3993860791. The next prime is 3993860833. The reversal of 3993860809 is 9080683993.

The square root of 3993860809 is 63197.

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., 3944468025 + 49392784 = 62805^2 + 7028^2 .

It is not a de Polignac number, because 3993860809 - 2⁵ = 3993860777 is a prime.

It is a super-2 number, since 2×3993860809² = 31901848323332268962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3993860809.

It is not an unprimeable number, because it can be changed into a prime (3993860839) 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, 31599 + ... + 94795.

Almost surely, 2^3993860809 is an apocalyptic number.

3993860809 is the 63197-th square number.

3993860809 is the 31599-th centered octagonal number.

It is an amenable number.

3993860809 is a deficient number, since it is larger than the sum of its proper divisors (63198).

3993860809 is an frugal number, since it uses more digits than its factorization.

3993860809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126394 (or 63197 counting only the distinct ones).

The product of its (nonzero) digits is 2519424, while the sum is 55.

The cubic root of 3993860809 is about 1586.5885229494.

The spelling of 3993860809 in words is "three billion, nine hundred ninety-three million, eight hundred sixty thousand, eight hundred nine".