4491631 has 2 divisors, whose sum is σ = 4491632. Its totient is φ = 4491630.

The previous prime is 4491623. The next prime is 4491653. The reversal of 4491631 is 1361944.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4491631 - 2³ = 4491623 is a prime.

It is a super-2 number, since 2×4491631² = 40349498080322, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4491631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4491671) 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, 2245815 + 2245816.

It is an arithmetic number, because the mean of its divisors is an integer number (2245816).

Almost surely, 2^4491631 is an apocalyptic number.

4491631 is a deficient number, since it is larger than the sum of its proper divisors (1).

4491631 is an equidigital number, since it uses as much as digits as its factorization.

4491631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 4491631 is about 2119.3468333428. The cubic root of 4491631 is about 164.9939514159.

It can be divided in two parts, 449 and 1631, that added together give a triangular number (2080 = T₆₄).

The spelling of 4491631 in words is "four million, four hundred ninety-one thousand, six hundred thirty-one".