3964949 has 2 divisors, whose sum is σ = 3964950. Its totient is φ = 3964948.

The previous prime is 3964943. The next prime is 3964951. The reversal of 3964949 is 9494693.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3678724 + 286225 = 1918^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 3964949 - 2⁸ = 3964693 is a prime.

It is a Sophie Germain prime.

Together with 3964951, it forms a pair of twin primes.

It is a Chen prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3964943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1982474 + 1982475.

It is an arithmetic number, because the mean of its divisors is an integer number (1982475).

Almost surely, 2^3964949 is an apocalyptic number.

It is an amenable number.

3964949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3964949 is an equidigital number, since it uses as much as digits as its factorization.

3964949 is an evil number, because the sum of its binary digits is even.

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

The square root of 3964949 is about 1991.2179689828. The cubic root of 3964949 is about 158.2750776144.

It can be divided in two parts, 3964 and 949, that added together give a cube (4913 = 17³).

The spelling of 3964949 in words is "three million, nine hundred sixty-four thousand, nine hundred forty-nine".