3965631 has 8 divisors (see below), whose sum is σ = 5301504. Its totient is φ = 2636760.

The previous prime is 3965629. The next prime is 3965639. The reversal of 3965631 is 1365693.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3965631 - 2¹ = 3965629 is a prime.

It is a super-2 number, since 2×3965631² = 31452458456322, which contains 22 as substring.

3965631 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3965592 and 3965601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3965639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241 + ... + 2826.

It is an arithmetic number, because the mean of its divisors is an integer number (662688).

Almost surely, 2^3965631 is an apocalyptic number.

3965631 is a deficient number, since it is larger than the sum of its proper divisors (1335873).

3965631 is a wasteful number, since it uses less digits than its factorization.

3965631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501.

The product of its digits is 14580, while the sum is 33.

The square root of 3965631 is about 1991.3892135893. The cubic root of 3965631 is about 158.2841519148.

The spelling of 3965631 in words is "three million, nine hundred sixty-five thousand, six hundred thirty-one".