3649637 has 2 divisors, whose sum is σ = 3649638. Its totient is φ = 3649636.

The previous prime is 3649609. The next prime is 3649669. The reversal of 3649637 is 7369463.

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., 3500641 + 148996 = 1871^2 + 386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3649637 - 2¹⁶ = 3584101 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3649637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3649687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1824818 + 1824819.

It is an arithmetic number, because the mean of its divisors is an integer number (1824819).

Almost surely, 2^3649637 is an apocalyptic number.

It is an amenable number.

3649637 is a deficient number, since it is larger than the sum of its proper divisors (1).

3649637 is an equidigital number, since it uses as much as digits as its factorization.

3649637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The square root of 3649637 is about 1910.4023136502. The cubic root of 3649637 is about 153.9630681101.

It can be divided in two parts, 364 and 9637, that added together give a palindrome (10001).

The spelling of 3649637 in words is "three million, six hundred forty-nine thousand, six hundred thirty-seven".