4040989 has 2 divisors, whose sum is σ = 4040990. Its totient is φ = 4040988.

The previous prime is 4040963. The next prime is 4041007. The reversal of 4040989 is 9890404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3392964 + 648025 = 1842^2 + 805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4040989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4040389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2020494 + 2020495.

It is an arithmetic number, because the mean of its divisors is an integer number (2020495).

Almost surely, 2^4040989 is an apocalyptic number.

It is an amenable number.

4040989 is a deficient number, since it is larger than the sum of its proper divisors (1).

4040989 is an equidigital number, since it uses as much as digits as its factorization.

4040989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 4040989 is about 2010.2211321146. The cubic root of 4040989 is about 159.2804801073.

The spelling of 4040989 in words is "four million, forty thousand, nine hundred eighty-nine".