6999447 has 16 divisors (see below), whose sum is σ = 11486720. Its totient is φ = 3691872.

The previous prime is 6999431. The next prime is 6999449. The reversal of 6999447 is 7449996.

It is not a de Polignac number, because 6999447 - 2⁴ = 6999431 is a prime.

6999447 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 6999396 and 6999405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6999449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12547 + ... + 13092.

It is an arithmetic number, because the mean of its divisors is an integer number (717920).

Almost surely, 2^6999447 is an apocalyptic number.

6999447 is a deficient number, since it is larger than the sum of its proper divisors (4487273).

6999447 is a wasteful number, since it uses less digits than its factorization.

6999447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25662.

The product of its digits is 489888, while the sum is 48.

The square root of 6999447 is about 2645.6468018237. The cubic root of 6999447 is about 191.2880807591.

The spelling of 6999447 in words is "six million, nine hundred ninety-nine thousand, four hundred forty-seven".