3219989 has 2 divisors, whose sum is σ = 3219990. Its totient is φ = 3219988.

The previous prime is 3219973. The next prime is 3220003. The reversal of 3219989 is 9899123.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3010225 + 209764 = 1735^2 + 458^2 .

It is a cyclic number.

It is not a de Polignac number, because 3219989 - 2⁴ = 3219973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3219929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609994 + 1609995.

It is an arithmetic number, because the mean of its divisors is an integer number (1609995).

Almost surely, 2^3219989 is an apocalyptic number.

It is an amenable number.

3219989 is a deficient number, since it is larger than the sum of its proper divisors (1).

3219989 is an equidigital number, since it uses as much as digits as its factorization.

3219989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 41.

The square root of 3219989 is about 1794.4327794598. The cubic root of 3219989 is about 147.6674570416.

It can be divided in two parts, 321998 and 9, that multiplied together give a palindrome (2897982).

The spelling of 3219989 in words is "three million, two hundred nineteen thousand, nine hundred eighty-nine".