5621989 has 2 divisors, whose sum is σ = 5621990. Its totient is φ = 5621988.

The previous prime is 5621983. The next prime is 5622007. The reversal of 5621989 is 9891265.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2873025 + 2748964 = 1695^2 + 1658^2 .

It is a cyclic number.

It is not a de Polignac number, because 5621989 - 2¹¹ = 5619941 is a prime.

It is a super-2 number, since 2×5621989² = 63213520632242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5621983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2810994 + 2810995.

It is an arithmetic number, because the mean of its divisors is an integer number (2810995).

Almost surely, 2^5621989 is an apocalyptic number.

It is an amenable number.

5621989 is a deficient number, since it is larger than the sum of its proper divisors (1).

5621989 is an equidigital number, since it uses as much as digits as its factorization.

5621989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 40.

The square root of 5621989 is about 2371.0733856210. The cubic root of 5621989 is about 177.8129268030.

The spelling of 5621989 in words is "five million, six hundred twenty-one thousand, nine hundred eighty-nine".