999250841 has 2 divisors, whose sum is σ = 999250842. Its totient is φ = 999250840.

The previous prime is 999250789. The next prime is 999250843. The reversal of 999250841 is 148052999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 987279241 + 11971600 = 31421^2 + 3460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999250841 is a prime.

Together with 999250843, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999250843) 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, 499625420 + 499625421.

It is an arithmetic number, because the mean of its divisors is an integer number (499625421).

Almost surely, 2^999250841 is an apocalyptic number.

It is an amenable number.

999250841 is a deficient number, since it is larger than the sum of its proper divisors (1).

999250841 is an equidigital number, since it uses as much as digits as its factorization.

999250841 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 999250841 is about 31610.9291385116. The cubic root of 999250841 is about 999.7502179475.

The spelling of 999250841 in words is "nine hundred ninety-nine million, two hundred fifty thousand, eight hundred forty-one".