40423004389 has 2 divisors, whose sum is σ = 40423004390. Its totient is φ = 40423004388.

The previous prime is 40423004351. The next prime is 40423004411. The reversal of 40423004389 is 98340032404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35632980289 + 4790024100 = 188767^2 + 69210^2 .

It is a cyclic number.

It is not a de Polignac number, because 40423004389 - 2³¹ = 38275520741 is a prime.

It is a super-2 number, since 2×40423004389² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40423004339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20211502194 + 20211502195.

It is an arithmetic number, because the mean of its divisors is an integer number (20211502195).

Almost surely, 2^40423004389 is an apocalyptic number.

It is an amenable number.

40423004389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40423004389 is an equidigital number, since it uses as much as digits as its factorization.

40423004389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 40423004389 in words is "forty billion, four hundred twenty-three million, four thousand, three hundred eighty-nine".