999990347 has 2 divisors, whose sum is σ = 999990348. Its totient is φ = 999990346.

The previous prime is 999990319. The next prime is 999990353. The reversal of 999990347 is 743099999.

It is a strong prime.

It is an emirp because it is prime and its reverse (743099999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999990347 - 2⁸ = 999990091 is a prime.

It is not a weakly prime, because it can be changed into another prime (999990947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499995173 + 499995174.

It is an arithmetic number, because the mean of its divisors is an integer number (499995174).

Almost surely, 2^999990347 is an apocalyptic number.

999990347 is a deficient number, since it is larger than the sum of its proper divisors (1).

999990347 is an equidigital number, since it uses as much as digits as its factorization.

999990347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4960116, while the sum is 59.

The square root of 999990347 is about 31622.6239739842. The cubic root of 999990347 is about 999.9967823230.

The spelling of 999990347 in words is "nine hundred ninety-nine million, nine hundred ninety thousand, three hundred forty-seven".