220399847 has 4 divisors (see below), whose sum is σ = 220614240. Its totient is φ = 220185456.

The previous prime is 220399841. The next prime is 220399871. The reversal of 220399847 is 748993022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 220399847 - 2⁴ = 220399831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220399798 and 220399807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220399841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105647 + ... + 107712.

It is an arithmetic number, because the mean of its divisors is an integer number (55153560).

Almost surely, 2^220399847 is an apocalyptic number.

220399847 is a deficient number, since it is larger than the sum of its proper divisors (214393).

220399847 is a wasteful number, since it uses less digits than its factorization.

220399847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214392.

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 220399847 is about 14845.8696949690. The cubic root of 220399847 is about 604.0465797082.

The spelling of 220399847 in words is "two hundred twenty million, three hundred ninety-nine thousand, eight hundred forty-seven".