3617989 has 2 divisors, whose sum is σ = 3617990. Its totient is φ = 3617988.

The previous prime is 3617987. The next prime is 3617993. The reversal of 3617989 is 9897163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2924100 + 693889 = 1710^2 + 833^2 .

It is a cyclic number.

It is not a de Polignac number, because 3617989 - 2¹ = 3617987 is a prime.

Together with 3617987, 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 (3617983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1808994 + 1808995.

It is an arithmetic number, because the mean of its divisors is an integer number (1808995).

Almost surely, 2^3617989 is an apocalyptic number.

It is an amenable number.

3617989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3617989 is an equidigital number, since it uses as much as digits as its factorization.

3617989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 3617989 is about 1902.1012065608. The cubic root of 3617989 is about 153.5167428253.

The spelling of 3617989 in words is "three million, six hundred seventeen thousand, nine hundred eighty-nine".