40609013 has 2 divisors, whose sum is σ = 40609014. Its totient is φ = 40609012.

The previous prime is 40608991. The next prime is 40609021. The reversal of 40609013 is 31090604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37429924 + 3179089 = 6118^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 40609013 - 2¹⁸ = 40346869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40609013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40609043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20304506 + 20304507.

It is an arithmetic number, because the mean of its divisors is an integer number (20304507).

Almost surely, 2^40609013 is an apocalyptic number.

It is an amenable number.

40609013 is a deficient number, since it is larger than the sum of its proper divisors (1).

40609013 is an equidigital number, since it uses as much as digits as its factorization.

40609013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 40609013 is about 6372.5201451231. The cubic root of 40609013 is about 343.7221170552.

Adding to 40609013 its reverse (31090604), we get a palindrome (71699617).

The spelling of 40609013 in words is "forty million, six hundred nine thousand, thirteen".