3865789 has 4 divisors (see below), whose sum is σ = 3869824. Its totient is φ = 3861756.

The previous prime is 3865777. The next prime is 3865801. The reversal of 3865789 is 9875683.

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 a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (3865777) and next prime (3865801).

It is a cyclic number.

It is not a de Polignac number, because 3865789 - 2¹⁹ = 3341501 is a prime.

It is a Duffinian number.

3865789 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3865769) 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, 334 + ... + 2800.

It is an arithmetic number, because the mean of its divisors is an integer number (967456).

Almost surely, 2^3865789 is an apocalyptic number.

It is an amenable number.

3865789 is a deficient number, since it is larger than the sum of its proper divisors (4035).

3865789 is a wasteful number, since it uses less digits than its factorization.

3865789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034.

The product of its digits is 362880, while the sum is 46.

The square root of 3865789 is about 1966.1609801845. The cubic root of 3865789 is about 156.9444811607.

The spelling of 3865789 in words is "three million, eight hundred sixty-five thousand, seven hundred eighty-nine".