40564837 has 2 divisors, whose sum is σ = 40564838. Its totient is φ = 40564836.

The previous prime is 40564813. The next prime is 40564871. The reversal of 40564837 is 73846504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40564161 + 676 = 6369^2 + 26^2 .

It is a cyclic number.

It is not a de Polignac number, because 40564837 - 2¹¹ = 40562789 is a prime.

It is equal to p_2465929 and since 40564837 and 2465929 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40564796 and 40564805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40564897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20282418 + 20282419.

It is an arithmetic number, because the mean of its divisors is an integer number (20282419).

Almost surely, 2^40564837 is an apocalyptic number.

It is an amenable number.

40564837 is a deficient number, since it is larger than the sum of its proper divisors (1).

40564837 is an equidigital number, since it uses as much as digits as its factorization.

40564837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 40564837 is about 6369.0530693346. The cubic root of 40564837 is about 343.5974339167.

The spelling of 40564837 in words is "forty million, five hundred sixty-four thousand, eight hundred thirty-seven".