40520017 has 2 divisors, whose sum is σ = 40520018. Its totient is φ = 40520016.

The previous prime is 40519991. The next prime is 40520057. The reversal of 40520017 is 71002504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29257281 + 11262736 = 5409^2 + 3356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40520017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40519976 and 40520003.

It is not a weakly prime, because it can be changed into another prime (40520057) 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, 20260008 + 20260009.

It is an arithmetic number, because the mean of its divisors is an integer number (20260009).

Almost surely, 2^40520017 is an apocalyptic number.

It is an amenable number.

40520017 is a deficient number, since it is larger than the sum of its proper divisors (1).

40520017 is an equidigital number, since it uses as much as digits as its factorization.

40520017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 280, while the sum is 19.

The square root of 40520017 is about 6365.5335204522. The cubic root of 40520017 is about 343.4708405957.

The spelling of 40520017 in words is "forty million, five hundred twenty thousand, seventeen".