3900849 has 4 divisors (see below), whose sum is σ = 5201136. Its totient is φ = 2600564.

The previous prime is 3900847. The next prime is 3900857. The reversal of 3900849 is 9480093.

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.

It is a cyclic number.

It is not a de Polignac number, because 3900849 - 2¹ = 3900847 is a prime.

It is a D-number.

It is a Curzon number.

3900849 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3900847) 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, 650139 + ... + 650144.

It is an arithmetic number, because the mean of its divisors is an integer number (1300284).

Almost surely, 2^3900849 is an apocalyptic number.

It is an amenable number.

3900849 is a deficient number, since it is larger than the sum of its proper divisors (1300287).

3900849 is a wasteful number, since it uses less digits than its factorization.

3900849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300286.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 3900849 is about 1975.0567080466. The cubic root of 3900849 is about 157.4175128662.

It can be divided in two parts, 390084 and 9, that added together give a palindrome (390093).

The spelling of 3900849 in words is "three million, nine hundred thousand, eight hundred forty-nine".