999899077 has 2 divisors, whose sum is σ = 999899078. Its totient is φ = 999899076.

The previous prime is 999899053. The next prime is 999899099. The reversal of 999899077 is 770998999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 525051396 + 474847681 = 22914^2 + 21791^2 .

It is a cyclic number.

It is not a de Polignac number, because 999899077 - 2¹¹ = 999897029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999896077) 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, 499949538 + 499949539.

It is an arithmetic number, because the mean of its divisors is an integer number (499949539).

Almost surely, 2^999899077 is an apocalyptic number.

It is an amenable number.

999899077 is a deficient number, since it is larger than the sum of its proper divisors (1).

999899077 is an equidigital number, since it uses as much as digits as its factorization.

999899077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23147208, while the sum is 67.

The square root of 999899077 is about 31621.1808286787. The cubic root of 999899077 is about 999.9663578682.

The spelling of 999899077 in words is "nine hundred ninety-nine million, eight hundred ninety-nine thousand, seventy-seven".