999250099 has 2 divisors, whose sum is σ = 999250100. Its totient is φ = 999250098.

The previous prime is 999250093. The next prime is 999250159. The reversal of 999250099 is 990052999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999250099 - 2⁵ = 999250067 is a prime.

It is not a weakly prime, because it can be changed into another prime (999250093) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499625049 + 499625050.

It is an arithmetic number, because the mean of its divisors is an integer number (499625050).

Almost surely, 2^999250099 is an apocalyptic number.

999250099 is a deficient number, since it is larger than the sum of its proper divisors (1).

999250099 is an equidigital number, since it uses as much as digits as its factorization.

999250099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 590490, while the sum is 52.

The square root of 999250099 is about 31610.9174020622. The cubic root of 999250099 is about 999.7499704905.

The spelling of 999250099 in words is "nine hundred ninety-nine million, two hundred fifty thousand, ninety-nine".