40343423437 has 2 divisors, whose sum is σ = 40343423438. Its totient is φ = 40343423436.

The previous prime is 40343423381. The next prime is 40343423453. The reversal of 40343423437 is 73432434304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31438481481 + 8904941956 = 177309^2 + 94366^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40343423437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40343423396 and 40343423405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40343420437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20171711718 + 20171711719.

It is an arithmetic number, because the mean of its divisors is an integer number (20171711719).

Almost surely, 2^40343423437 is an apocalyptic number.

It is an amenable number.

40343423437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40343423437 is an equidigital number, since it uses as much as digits as its factorization.

40343423437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 37.

The spelling of 40343423437 in words is "forty billion, three hundred forty-three million, four hundred twenty-three thousand, four hundred thirty-seven".