3955949 has 2 divisors, whose sum is σ = 3955950. Its totient is φ = 3955948.

The previous prime is 3955927. The next prime is 3955969. The reversal of 3955949 is 9495593.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2706025 + 1249924 = 1645^2 + 1118^2 .

It is an emirp because it is prime and its reverse (9495593) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3955949 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3955909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1977974 + 1977975.

It is an arithmetic number, because the mean of its divisors is an integer number (1977975).

Almost surely, 2^3955949 is an apocalyptic number.

It is an amenable number.

3955949 is a deficient number, since it is larger than the sum of its proper divisors (1).

3955949 is an equidigital number, since it uses as much as digits as its factorization.

3955949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 218700, while the sum is 44.

The square root of 3955949 is about 1988.9567617221. The cubic root of 3955949 is about 158.1552311918.

It can be divided in two parts, 39559 and 49, that multiplied together give a palindrome (1938391).

The spelling of 3955949 in words is "three million, nine hundred fifty-five thousand, nine hundred forty-nine".