3638249 has 2 divisors, whose sum is σ = 3638250. Its totient is φ = 3638248.

The previous prime is 3638237. The next prime is 3638251. The reversal of 3638249 is 9428363.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3636649 + 1600 = 1907^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 3638249 - 2⁴ = 3638233 is a prime.

Together with 3638251, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (3638279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1819124 + 1819125.

It is an arithmetic number, because the mean of its divisors is an integer number (1819125).

Almost surely, 2^3638249 is an apocalyptic number.

It is an amenable number.

3638249 is a deficient number, since it is larger than the sum of its proper divisors (1).

3638249 is an equidigital number, since it uses as much as digits as its factorization.

3638249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 3638249 is about 1907.4194609472. The cubic root of 3638249 is about 153.8027637444.

The spelling of 3638249 in words is "three million, six hundred thirty-eight thousand, two hundred forty-nine".