40843013 has 2 divisors, whose sum is σ = 40843014. Its totient is φ = 40843012.

The previous prime is 40842979. The next prime is 40843031. The reversal of 40843013 is 31034804.

Together with next prime (40843031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32069569 + 8773444 = 5663^2 + 2962^2 .

It is a cyclic number.

It is not a de Polignac number, because 40843013 - 2⁸ = 40842757 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40843013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40849013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20421506 + 20421507.

It is an arithmetic number, because the mean of its divisors is an integer number (20421507).

Almost surely, 2^40843013 is an apocalyptic number.

It is an amenable number.

40843013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40843013 is an equidigital number, since it uses as much as digits as its factorization.

40843013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40843013 is about 6390.8538553154. The cubic root of 40843013 is about 344.3810592772.

Adding to 40843013 its reverse (31034804), we get a palindrome (71877817).

The spelling of 40843013 in words is "forty million, eight hundred forty-three thousand, thirteen".