40447013 has 2 divisors, whose sum is σ = 40447014. Its totient is φ = 40447012.

The previous prime is 40447009. The next prime is 40447039. The reversal of 40447013 is 31074404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40157569 + 289444 = 6337^2 + 538^2 .

It is a cyclic number.

It is not a de Polignac number, because 40447013 - 2² = 40447009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40447013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40447073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20223506 + 20223507.

It is an arithmetic number, because the mean of its divisors is an integer number (20223507).

Almost surely, 2^40447013 is an apocalyptic number.

It is an amenable number.

40447013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40447013 is an equidigital number, since it uses as much as digits as its factorization.

40447013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40447013 is about 6359.7966162449. The cubic root of 40447013 is about 343.2644420379.

The spelling of 40447013 in words is "forty million, four hundred forty-seven thousand, thirteen".