3861099 has 24 divisors (see below), whose sum is σ = 6232512. Its totient is φ = 2283120.

The previous prime is 3861083. The next prime is 3861113. The reversal of 3861099 is 9901683.

3861099 is a `hidden beast` number, since 38 + 610 + 9 + 9 = 666.

It is not a de Polignac number, because 3861099 - 2⁴ = 3861083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3861059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3804 + ... + 4710.

It is an arithmetic number, because the mean of its divisors is an integer number (259688).

Almost surely, 2^3861099 is an apocalyptic number.

3861099 is a deficient number, since it is larger than the sum of its proper divisors (2371413).

3861099 is a wasteful number, since it uses less digits than its factorization.

3861099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 3861099 is about 1964.9679386697. The cubic root of 3861099 is about 156.8809867929.

It can be divided in two parts, 386 and 1099, that added together give a triangular number (1485 = T₅₄).

The spelling of 3861099 in words is "three million, eight hundred sixty-one thousand, ninety-nine".