999991301 has 2 divisors, whose sum is σ = 999991302. Its totient is φ = 999991300.

The previous prime is 999991283. The next prime is 999991327. The reversal of 999991301 is 103199999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 806503201 + 193488100 = 28399^2 + 13910^2 .

It is a cyclic number.

It is not a de Polignac number, because 999991301 - 2¹⁴ = 999974917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999991301.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999991331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499995650 + 499995651.

It is an arithmetic number, because the mean of its divisors is an integer number (499995651).

Almost surely, 2^999991301 is an apocalyptic number.

It is an amenable number.

999991301 is a deficient number, since it is larger than the sum of its proper divisors (1).

999991301 is an equidigital number, since it uses as much as digits as its factorization.

999991301 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 177147, while the sum is 50.

The square root of 999991301 is about 31622.6390581178. The cubic root of 999991301 is about 999.9971003249.

The spelling of 999991301 in words is "nine hundred ninety-nine million, nine hundred ninety-one thousand, three hundred one".