40841989 has 4 divisors (see below), whose sum is σ = 40854924. Its totient is φ = 40829056.

The previous prime is 40841987. The next prime is 40842017. The reversal of 40841989 is 98914804.

40841989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 31169889 + 9672100 = 5583^2 + 3110^2 .

It is a cyclic number.

It is not a de Polignac number, because 40841989 - 2¹ = 40841987 is a prime.

It is a super-2 number, since 2×40841989² = 3336136130952242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40841981) 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 in 3 ways as a sum of consecutive naturals, for example, 1749 + ... + 9205.

It is an arithmetic number, because the mean of its divisors is an integer number (10213731).

Almost surely, 2^40841989 is an apocalyptic number.

It is an amenable number.

40841989 is a deficient number, since it is larger than the sum of its proper divisors (12935).

40841989 is an equidigital number, since it uses as much as digits as its factorization.

40841989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12934.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 40841989 is about 6390.7737403228. The cubic root of 40841989 is about 344.3781811909.

The spelling of 40841989 in words is "forty million, eight hundred forty-one thousand, nine hundred eighty-nine".