3905949 has 8 divisors (see below), whose sum is σ = 5222880. Its totient is φ = 2596496.

The previous prime is 3905933. The next prime is 3905953. The reversal of 3905949 is 9495093.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3905949 - 2⁴ = 3905933 is a prime.

It is a Curzon number.

3905949 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3905999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507 + ... + 2840.

It is an arithmetic number, because the mean of its divisors is an integer number (652860).

Almost surely, 2^3905949 is an apocalyptic number.

It is an amenable number.

3905949 is a deficient number, since it is larger than the sum of its proper divisors (1316931).

3905949 is a wasteful number, since it uses less digits than its factorization.

3905949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3739.

The product of its (nonzero) digits is 43740, while the sum is 39.

The square root of 3905949 is about 1976.3473884922. The cubic root of 3905949 is about 157.4860859464.

The spelling of 3905949 in words is "three million, nine hundred five thousand, nine hundred forty-nine".