999307 has 2 divisors, whose sum is σ = 999308. Its totient is φ = 999306.

The previous prime is 999287. The next prime is 999329. The reversal of 999307 is 703999.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999307 - 2¹¹ = 997259 is a prime.

It is a super-2 number, since 2×999307² = 1997228960498, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499653 + 499654.

It is an arithmetic number, because the mean of its divisors is an integer number (499654).

2⁹⁹⁹³⁰⁷ is an apocalyptic number.

999307 is a deficient number, since it is larger than the sum of its proper divisors (1).

999307 is an equidigital number, since it uses as much as digits as its factorization.

999307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15309, while the sum is 37.

The square root of 999307 is about 999.6534399481. The cubic root of 999307 is about 99.9768946618.

The spelling of 999307 in words is "nine hundred ninety-nine thousand, three hundred seven".