40422989 has 2 divisors, whose sum is σ = 40422990. Its totient is φ = 40422988.

The previous prime is 40422973. The next prime is 40423001. The reversal of 40422989 is 98922404.

40422989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 100489 = 6350^2 + 317^2 .

It is a cyclic number.

It is not a de Polignac number, because 40422989 - 2⁴ = 40422973 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40422919) 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, 20211494 + 20211495.

It is an arithmetic number, because the mean of its divisors is an integer number (20211495).

Almost surely, 2^40422989 is an apocalyptic number.

It is an amenable number.

40422989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40422989 is an equidigital number, since it uses as much as digits as its factorization.

40422989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 40422989 is about 6357.9075960571. The cubic root of 40422989 is about 343.1964665345.

The spelling of 40422989 in words is "forty million, four hundred twenty-two thousand, nine hundred eighty-nine".