4026989 has 2 divisors, whose sum is σ = 4026990. Its totient is φ = 4026988.

The previous prime is 4026973. The next prime is 4027021. The reversal of 4026989 is 9896204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2941225 + 1085764 = 1715^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 4026989 - 2⁴ = 4026973 is a prime.

It is a super-2 number, since 2×4026989² = 32433280812242, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4026949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2013494 + 2013495.

It is an arithmetic number, because the mean of its divisors is an integer number (2013495).

Almost surely, 2^4026989 is an apocalyptic number.

It is an amenable number.

4026989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4026989 is an equidigital number, since it uses as much as digits as its factorization.

4026989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 4026989 is about 2006.7359068896. The cubic root of 4026989 is about 159.0963249511.

The spelling of 4026989 in words is "four million, twenty-six thousand, nine hundred eighty-nine".