999999940517 has 2 divisors, whose sum is σ = 999999940518. Its totient is φ = 999999940516.

The previous prime is 999999940483. The next prime is 999999940519. The reversal of 999999940517 is 715049999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 994888548481 + 5111392036 = 997441^2 + 71494^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999940517 - 2³⁴ = 982820071333 is a prime.

Together with 999999940519, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999999940519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999970258 + 499999970259.

It is an arithmetic number, because the mean of its divisors is an integer number (499999970259).

Almost surely, 2^999999940517 is an apocalyptic number.

It is an amenable number.

999999940517 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999940517 is an equidigital number, since it uses as much as digits as its factorization.

999999940517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 669615660, while the sum is 80.

The spelling of 999999940517 in words is "nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred forty thousand, five hundred seventeen".