3638653 has 2 divisors, whose sum is σ = 3638654. Its totient is φ = 3638652.

The previous prime is 3638651. The next prime is 3638699. The reversal of 3638653 is 3568363.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2424249 + 1214404 = 1557^2 + 1102^2 .

It is a cyclic number.

It is not a de Polignac number, because 3638653 - 2¹ = 3638651 is a prime.

Together with 3638651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3638651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819326 + 1819327.

It is an arithmetic number, because the mean of its divisors is an integer number (1819327).

Almost surely, 2^3638653 is an apocalyptic number.

It is an amenable number.

3638653 is a deficient number, since it is larger than the sum of its proper divisors (1).

3638653 is an equidigital number, since it uses as much as digits as its factorization.

3638653 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 3638653 is about 1907.5253602508. The cubic root of 3638653 is about 153.8084564111.

The spelling of 3638653 in words is "three million, six hundred thirty-eight thousand, six hundred fifty-three".