3946949 has 4 divisors (see below), whose sum is σ = 3953964. Its totient is φ = 3939936.

The previous prime is 3946939. The next prime is 3946981. The reversal of 3946949 is 9496493.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9496493 = 23 ⋅412891.

It can be written as a sum of positive squares in 2 ways, for example, as 66049 + 3880900 = 257^2 + 1970^2 .

It is a cyclic number.

It is not a de Polignac number, because 3946949 - 2⁴ = 3946933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3946939) 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, 2582 + ... + 3815.

It is an arithmetic number, because the mean of its divisors is an integer number (988491).

Almost surely, 2^3946949 is an apocalyptic number.

It is an amenable number.

3946949 is a deficient number, since it is larger than the sum of its proper divisors (7015).

3946949 is an equidigital number, since it uses as much as digits as its factorization.

3946949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7014.

The product of its digits is 209952, while the sum is 44.

The square root of 3946949 is about 1986.6929808101. The cubic root of 3946949 is about 158.0352028595.

The spelling of 3946949 in words is "three million, nine hundred forty-six thousand, nine hundred forty-nine".