40043489 has 2 divisors, whose sum is σ = 40043490. Its totient is φ = 40043488.

The previous prime is 40043467. The next prime is 40043527. The reversal of 40043489 is 98434004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38651089 + 1392400 = 6217^2 + 1180^2 .

It is a cyclic number.

It is not a de Polignac number, because 40043489 - 2⁸ = 40043233 is a prime.

It is a super-2 number, since 2×40043489² = 3206962022586242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40043189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021744 + 20021745.

It is an arithmetic number, because the mean of its divisors is an integer number (20021745).

Almost surely, 2^40043489 is an apocalyptic number.

It is an amenable number.

40043489 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043489 is an equidigital number, since it uses as much as digits as its factorization.

40043489 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 40043489 is about 6327.9924936744. The cubic root of 40043489 is about 342.1190863514.

The spelling of 40043489 in words is "forty million, forty-three thousand, four hundred eighty-nine".