3866239123 has 4 divisors (see below), whose sum is σ = 3866364360. Its totient is φ = 3866113888.

The previous prime is 3866239103. The next prime is 3866239151. The reversal of 3866239123 is 3219326683.

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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3866239123 is a prime.

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 3866239123.

It is not an unprimeable number, because it can be changed into a prime (3866239103) 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, 20208 + ... + 90226.

It is an arithmetic number, because the mean of its divisors is an integer number (966591090).

Almost surely, 2^3866239123 is an apocalyptic number.

3866239123 is a deficient number, since it is larger than the sum of its proper divisors (125237).

3866239123 is an equidigital number, since it uses as much as digits as its factorization.

3866239123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125236.

The product of its digits is 279936, while the sum is 43.

The square root of 3866239123 is about 62179.0891136240. The cubic root of 3866239123 is about 1569.5057233456.

The spelling of 3866239123 in words is "three billion, eight hundred sixty-six million, two hundred thirty-nine thousand, one hundred twenty-three".