3949961 has 2 divisors, whose sum is σ = 3949962. Its totient is φ = 3949960.

The previous prime is 3949919. The next prime is 3949969. The reversal of 3949961 is 1699493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3924361 + 25600 = 1981^2 + 160^2 .

It is a cyclic number.

It is not a de Polignac number, because 3949961 - 2¹⁴ = 3933577 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (3949969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1974980 + 1974981.

It is an arithmetic number, because the mean of its divisors is an integer number (1974981).

Almost surely, 2^3949961 is an apocalyptic number.

It is an amenable number.

3949961 is a deficient number, since it is larger than the sum of its proper divisors (1).

3949961 is an equidigital number, since it uses as much as digits as its factorization.

3949961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52488, while the sum is 41.

The square root of 3949961 is about 1987.4508798962. The cubic root of 3949961 is about 158.0753926365.

The spelling of 3949961 in words is "three million, nine hundred forty-nine thousand, nine hundred sixty-one".