999986069 has 2 divisors, whose sum is σ = 999986070. Its totient is φ = 999986068.

The previous prime is 999986059. The next prime is 999986089. The reversal of 999986069 is 960689999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 993069169 + 6916900 = 31513^2 + 2630^2 .

It is an emirp because it is prime and its reverse (960689999) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999986069 is a prime.

It is a super-2 number, since 2×999986069² = 1999944276388145522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 999985996 and 999986014.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999986059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499993034 + 499993035.

It is an arithmetic number, because the mean of its divisors is an integer number (499993035).

Almost surely, 2^999986069 is an apocalyptic number.

It is an amenable number.

999986069 is a deficient number, since it is larger than the sum of its proper divisors (1).

999986069 is an equidigital number, since it uses as much as digits as its factorization.

999986069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17006112, while the sum is 65.

The square root of 999986069 is about 31622.5563324662. The cubic root of 999986069 is about 999.9953563118.

The spelling of 999986069 in words is "nine hundred ninety-nine million, nine hundred eighty-six thousand, sixty-nine".