999406547 has 2 divisors, whose sum is σ = 999406548. Its totient is φ = 999406546.

The previous prime is 999406501. The next prime is 999406549. The reversal of 999406547 is 745604999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999406547 - 2⁶ = 999406483 is a prime.

Together with 999406549, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999406549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499703273 + 499703274.

It is an arithmetic number, because the mean of its divisors is an integer number (499703274).

Almost surely, 2^999406547 is an apocalyptic number.

999406547 is a deficient number, since it is larger than the sum of its proper divisors (1).

999406547 is an equidigital number, since it uses as much as digits as its factorization.

999406547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 999406547 is about 31613.3918933100. The cubic root of 999406547 is about 999.8021431886.

The spelling of 999406547 in words is "nine hundred ninety-nine million, four hundred six thousand, five hundred forty-seven".