3866860249 has 4 divisors (see below), whose sum is σ = 4419268864. Its totient is φ = 3314451636.

The previous prime is 3866860241. The next prime is 3866860253. The reversal of 3866860249 is 9420686683.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9420686683 = 10687 ⋅881509.

It is a cyclic number.

It is not a de Polignac number, because 3866860249 - 2³ = 3866860241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3866860196 and 3866860205.

It is not an unprimeable number, because it can be changed into a prime (3866860241) 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, 276204297 + ... + 276204310.

It is an arithmetic number, because the mean of its divisors is an integer number (1104817216).

Almost surely, 2^3866860249 is an apocalyptic number.

It is an amenable number.

3866860249 is a deficient number, since it is larger than the sum of its proper divisors (552408615).

3866860249 is an equidigital number, since it uses as much as digits as its factorization.

3866860249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552408614.

The product of its (nonzero) digits is 2985984, while the sum is 52.

The square root of 3866860249 is about 62184.0835664561. The cubic root of 3866860249 is about 1569.5897678636.

The spelling of 3866860249 in words is "three billion, eight hundred sixty-six million, eight hundred sixty thousand, two hundred forty-nine".