3961634 has 4 divisors (see below), whose sum is σ = 5942454. Its totient is φ = 1980816.

The previous prime is 3961631. The next prime is 3961649. The reversal of 3961634 is 4361693.

It is a happy number.

3961634 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 61009 = 1975^2 + 247^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3961634.

It is not an unprimeable number, because it can be changed into a prime (3961631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 990407 + ... + 990410.

Almost surely, 2^3961634 is an apocalyptic number.

3961634 is a deficient number, since it is larger than the sum of its proper divisors (1980820).

3961634 is a wasteful number, since it uses less digits than its factorization.

3961634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1980819.

The product of its digits is 11664, while the sum is 32.

The square root of 3961634 is about 1990.3853898178. The cubic root of 3961634 is about 158.2309553004.

The spelling of 3961634 in words is "three million, nine hundred sixty-one thousand, six hundred thirty-four".