40621717 has 2 divisors, whose sum is σ = 40621718. Its totient is φ = 40621716.

The previous prime is 40621699. The next prime is 40621729. The reversal of 40621717 is 71712604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30924721 + 9696996 = 5561^2 + 3114^2 .

It is a cyclic number.

It is not a de Polignac number, because 40621717 - 2¹¹ = 40619669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40621747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20310858 + 20310859.

It is an arithmetic number, because the mean of its divisors is an integer number (20310859).

Almost surely, 2^40621717 is an apocalyptic number.

It is an amenable number.

40621717 is a deficient number, since it is larger than the sum of its proper divisors (1).

40621717 is an equidigital number, since it uses as much as digits as its factorization.

40621717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 40621717 is about 6373.5168470790. The cubic root of 40621717 is about 343.7579563117.

The spelling of 40621717 in words is "forty million, six hundred twenty-one thousand, seven hundred seventeen".