999319001 has 2 divisors, whose sum is σ = 999319002. Its totient is φ = 999319000.

The previous prime is 999318997. The next prime is 999319021. The reversal of 999319001 is 100913999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745235401 + 254083600 = 27299^2 + 15940^2 .

It is an emirp because it is prime and its reverse (100913999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999319001 - 2² = 999318997 is a prime.

It is equal to p_50814869 and since 999319001 and 50814869 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999319001.

It is not a weakly prime, because it can be changed into another prime (999319021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499659500 + 499659501.

It is an arithmetic number, because the mean of its divisors is an integer number (499659501).

Almost surely, 2^999319001 is an apocalyptic number.

It is an amenable number.

999319001 is a deficient number, since it is larger than the sum of its proper divisors (1).

999319001 is an equidigital number, since it uses as much as digits as its factorization.

999319001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 41.

The square root of 999319001 is about 31612.0072282669. The cubic root of 999319001 is about 999.7729487850.

The spelling of 999319001 in words is "nine hundred ninety-nine million, three hundred nineteen thousand, one".