999550099 has 2 divisors, whose sum is σ = 999550100. Its totient is φ = 999550098.

The previous prime is 999550051. The next prime is 999550109. The reversal of 999550099 is 990055999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999550099 - 2¹¹ = 999548051 is a prime.

It is a zygodrome in base 10.

It is not a weakly prime, because it can be changed into another prime (999550009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499775049 + 499775050.

It is an arithmetic number, because the mean of its divisors is an integer number (499775050).

Almost surely, 2^999550099 is an apocalyptic number.

999550099 is a deficient number, since it is larger than the sum of its proper divisors (1).

999550099 is an equidigital number, since it uses as much as digits as its factorization.

999550099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1476225, while the sum is 55.

The square root of 999550099 is about 31615.6622419965. The cubic root of 999550099 is about 999.8500105043.

The spelling of 999550099 in words is "nine hundred ninety-nine million, five hundred fifty thousand, ninety-nine".