3318631 has 2 divisors, whose sum is σ = 3318632. Its totient is φ = 3318630.

The previous prime is 3318629. The next prime is 3318671. The reversal of 3318631 is 1368133.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3318631 - 2¹ = 3318629 is a prime.

It is a super-2 number, since 2×3318631² = 22026623428322, which contains 22 as substring.

Together with 3318629, it forms a pair of twin primes.

It is equal to p₂₃₈₁₄₇ and since 3318631 and 238147 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 3318596 and 3318605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3318671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1659315 + 1659316.

It is an arithmetic number, because the mean of its divisors is an integer number (1659316).

Almost surely, 2^3318631 is an apocalyptic number.

3318631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3318631 is an equidigital number, since it uses as much as digits as its factorization.

3318631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 25.

The square root of 3318631 is about 1821.7110089144. The cubic root of 3318631 is about 149.1602108390.

The spelling of 3318631 in words is "three million, three hundred eighteen thousand, six hundred thirty-one".