3901631 has 16 divisors (see below), whose sum is σ = 4351200. Its totient is φ = 3483648.

The previous prime is 3901609. The next prime is 3901649. The reversal of 3901631 is 1361093.

It is a cyclic number.

It is not a de Polignac number, because 3901631 - 2¹⁴ = 3885247 is a prime.

It is a super-2 number, since 2×3901631² = 30445448920322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3901597 and 3901606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3901661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40175 + ... + 40271.

It is an arithmetic number, because the mean of its divisors is an integer number (271950).

Almost surely, 2^3901631 is an apocalyptic number.

3901631 is a deficient number, since it is larger than the sum of its proper divisors (449569).

3901631 is a wasteful number, since it uses less digits than its factorization.

3901631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 486, while the sum is 23.

The square root of 3901631 is about 1975.2546671252. The cubic root of 3901631 is about 157.4280312833.

The spelling of 3901631 in words is "three million, nine hundred one thousand, six hundred thirty-one".