40844003989 has 2 divisors, whose sum is σ = 40844003990. Its totient is φ = 40844003988.

The previous prime is 40844003987. The next prime is 40844004013. The reversal of 40844003989 is 98930044804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36775732900 + 4068271089 = 191770^2 + 63783^2 .

It is a cyclic number.

It is not a de Polignac number, because 40844003989 - 2¹ = 40844003987 is a prime.

Together with 40844003987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40844003987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20422001994 + 20422001995.

It is an arithmetic number, because the mean of its divisors is an integer number (20422001995).

Almost surely, 2^40844003989 is an apocalyptic number.

It is an amenable number.

40844003989 is a deficient number, since it is larger than the sum of its proper divisors (1).

40844003989 is an equidigital number, since it uses as much as digits as its factorization.

40844003989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 40844003989 in words is "forty billion, eight hundred forty-four million, three thousand, nine hundred eighty-nine".