999992447 has 2 divisors, whose sum is σ = 999992448. Its totient is φ = 999992446.

The previous prime is 999992423. The next prime is 999992509. The reversal of 999992447 is 744299999.

It is a happy number.

It is an a-pointer prime, because the next prime (999992509) can be obtained adding 999992447 to its sum of digits (62).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999992447 - 2¹⁰ = 999991423 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999992447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999992407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499996223 + 499996224.

It is an arithmetic number, because the mean of its divisors is an integer number (499996224).

Almost surely, 2^999992447 is an apocalyptic number.

999992447 is a deficient number, since it is larger than the sum of its proper divisors (1).

999992447 is an equidigital number, since it uses as much as digits as its factorization.

999992447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 62.

The square root of 999992447 is about 31622.6571780425. The cubic root of 999992447 is about 999.9974823270.

The spelling of 999992447 in words is "nine hundred ninety-nine million, nine hundred ninety-two thousand, four hundred forty-seven".