3653631 has 6 divisors (see below), whose sum is σ = 5277480. Its totient is φ = 2435748.

The previous prime is 3653603. The next prime is 3653647. The reversal of 3653631 is 1363563.

3653631 is a `hidden beast` number, since 3 + 653 + 6 + 3 + 1 = 666.

It is not a de Polignac number, because 3653631 - 2⁵ = 3653599 is a prime.

It is a super-2 number, since 2×3653631² = 26698038968322, which contains 22 as substring.

It is a d-powerful number, because it can be written as 3¹¹ + 6⁵ + 5³ + 3¹³ + 6⁷ + 3¹³ + 1 .

3653631 is a lucky number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 3653595 and 3653604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3653651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202971 + ... + 202988.

It is an arithmetic number, because the mean of its divisors is an integer number (879580).

Almost surely, 2^3653631 is an apocalyptic number.

3653631 is a deficient number, since it is larger than the sum of its proper divisors (1623849).

3653631 is a wasteful number, since it uses less digits than its factorization.

3653631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405965 (or 405962 counting only the distinct ones).

The product of its digits is 4860, while the sum is 27.

The square root of 3653631 is about 1911.4473573708. The cubic root of 3653631 is about 154.0192110739.

The spelling of 3653631 in words is "three million, six hundred fifty-three thousand, six hundred thirty-one".