999996407 has 2 divisors, whose sum is σ = 999996408. Its totient is φ = 999996406.

The previous prime is 999996383. The next prime is 999996469. The reversal of 999996407 is 704699999.

It is an a-pointer prime, because the next prime (999996469) can be obtained adding 999996407 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999996407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999996407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999996007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499998203 + 499998204.

It is an arithmetic number, because the mean of its divisors is an integer number (499998204).

Almost surely, 2^999996407 is an apocalyptic number.

999996407 is a deficient number, since it is larger than the sum of its proper divisors (1).

999996407 is an equidigital number, since it uses as much as digits as its factorization.

999996407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9920232, while the sum is 62.

The square root of 999996407 is about 31622.7197913146. The cubic root of 999996407 is about 999.9988023319.

The spelling of 999996407 in words is "nine hundred ninety-nine million, nine hundred ninety-six thousand, four hundred seven".