4000631 has 2 divisors, whose sum is σ = 4000632. Its totient is φ = 4000630.

The previous prime is 4000589. The next prime is 4000649. The reversal of 4000631 is 1360004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 4000631 - 2⁶ = 4000567 is a prime.

It is a super-2 number, since 2×4000631² = 32010096796322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000651) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000315 + 2000316.

It is an arithmetic number, because the mean of its divisors is an integer number (2000316).

Almost surely, 2^4000631 is an apocalyptic number.

4000631 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000631 is an equidigital number, since it uses as much as digits as its factorization.

4000631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 4000631 is about 2000.1577437792. The cubic root of 4000631 is about 158.7484518418.

Adding to 4000631 its reverse (1360004), we get a palindrome (5360635).

The spelling of 4000631 in words is "four million, six hundred thirty-one", and thus it is an aban number.