40012913 has 2 divisors, whose sum is σ = 40012914. Its totient is φ = 40012912.

The previous prime is 40012897. The next prime is 40012937. The reversal of 40012913 is 31921004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25321024 + 14691889 = 5032^2 + 3833^2 .

It is a cyclic number.

It is not a de Polignac number, because 40012913 - 2⁴ = 40012897 is a prime.

It is equal to p_2434412 and since 40012913 and 2434412 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40012963) 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, 20006456 + 20006457.

It is an arithmetic number, because the mean of its divisors is an integer number (20006457).

Almost surely, 2^40012913 is an apocalyptic number.

It is an amenable number.

40012913 is a deficient number, since it is larger than the sum of its proper divisors (1).

40012913 is an equidigital number, since it uses as much as digits as its factorization.

40012913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 40012913 is about 6325.5761002457. The cubic root of 40012913 is about 342.0319869082.

Adding to 40012913 its reverse (31921004), we get a palindrome (71933917).

The spelling of 40012913 in words is "forty million, twelve thousand, nine hundred thirteen".