3657631 has 2 divisors, whose sum is σ = 3657632. Its totient is φ = 3657630.

The previous prime is 3657617. The next prime is 3657637. The reversal of 3657631 is 1367563.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3657631 - 2⁹ = 3657119 is a prime.

It is a super-2 number, since 2×3657631² = 26756529064322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3657593 and 3657602.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3657637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1828815 + 1828816.

It is an arithmetic number, because the mean of its divisors is an integer number (1828816).

Almost surely, 2^3657631 is an apocalyptic number.

3657631 is a deficient number, since it is larger than the sum of its proper divisors (1).

3657631 is an equidigital number, since it uses as much as digits as its factorization.

3657631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 31.

The square root of 3657631 is about 1912.4933986814. The cubic root of 3657631 is about 154.0753973859.

The spelling of 3657631 in words is "three million, six hundred fifty-seven thousand, six hundred thirty-one".