3782871209 has 4 divisors (see below), whose sum is σ = 4073861316. Its totient is φ = 3491881104.

The previous prime is 3782871181. The next prime is 3782871223. The reversal of 3782871209 is 9021782873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9021782873 = 421 ⋅21429413.

It can be written as a sum of positive squares in 2 ways, for example, as 2277198400 + 1505672809 = 47720^2 + 38803^2 .

It is a cyclic number.

It is not a de Polignac number, because 3782871209 - 2¹² = 3782867113 is a prime.

It is a super-2 number, since 2×3782871209² = 28620229167762243362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3782871299) 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, 145495034 + ... + 145495059.

It is an arithmetic number, because the mean of its divisors is an integer number (1018465329).

Almost surely, 2^3782871209 is an apocalyptic number.

It is an amenable number.

3782871209 is a deficient number, since it is larger than the sum of its proper divisors (290990107).

3782871209 is a wasteful number, since it uses less digits than its factorization.

3782871209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290990106.

The product of its (nonzero) digits is 338688, while the sum is 47.

The square root of 3782871209 is about 61505.0502723150. The cubic root of 3782871209 is about 1558.1425417353.

The spelling of 3782871209 in words is "three billion, seven hundred eighty-two million, eight hundred seventy-one thousand, two hundred nine".