3685631 has 2 divisors, whose sum is σ = 3685632. Its totient is φ = 3685630.

The previous prime is 3685597. The next prime is 3685657. The reversal of 3685631 is 1365863.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3685631 - 2¹⁰ = 3684607 is a prime.

It is a super-2 number, since 2×3685631² = 27167751736322, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3685691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1842815 + 1842816.

It is an arithmetic number, because the mean of its divisors is an integer number (1842816).

Almost surely, 2^3685631 is an apocalyptic number.

3685631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3685631 is an equidigital number, since it uses as much as digits as its factorization.

3685631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 32.

The square root of 3685631 is about 1919.7997291384. The cubic root of 3685631 is about 154.4675591618.

The spelling of 3685631 in words is "three million, six hundred eighty-five thousand, six hundred thirty-one".