999996677 has 2 divisors, whose sum is σ = 999996678. Its totient is φ = 999996676.

The previous prime is 999996671. The next prime is 999996689. The reversal of 999996677 is 776699999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990423841 + 9572836 = 31471^2 + 3094^2 .

It is a cyclic number.

It is not a de Polignac number, because 999996677 - 2²² = 995802373 is a prime.

It is a super-2 number, since 2×999996677² = 1999986708022084658, which contains 22 as substring.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999996677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999996671) 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, 499998338 + 499998339.

It is an arithmetic number, because the mean of its divisors is an integer number (499998339).

Almost surely, 2^999996677 is an apocalyptic number.

It is an amenable number.

999996677 is a deficient number, since it is larger than the sum of its proper divisors (1).

999996677 is an equidigital number, since it uses as much as digits as its factorization.

999996677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 104162436, while the sum is 71.

The square root of 999996677 is about 31622.7240603968. The cubic root of 999996677 is about 999.9988923321.

The spelling of 999996677 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, six hundred seventy-seven".