999999950945609 has 2 divisors, whose sum is σ = 999999950945610. Its totient is φ = 999999950945608.

The previous prime is 999999950945581. The next prime is 999999950945617. The reversal of 999999950945609 is 906549059999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 860660742480400 + 139339208465209 = 29337020^2 + 11804203^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999999950945609 is a prime.

It is a super-3 number, since 3×999999950945609³ (a number of 46 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (999999950942609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999975472804 + 499999975472805.

It is an arithmetic number, because the mean of its divisors is an integer number (499999975472805).

Almost surely, 2^{999999950945609} is an apocalyptic number.

It is an amenable number.

999999950945609 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999950945609 is an equidigital number, since it uses as much as digits as its factorization.

999999950945609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 232452293400, while the sum is 101.

The spelling of 999999950945609 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred fifty million, nine hundred forty-five thousand, six hundred nine".