220749847 has 4 divisors (see below), whose sum is σ = 232368280. Its totient is φ = 209131416.

The previous prime is 220749773. The next prime is 220749877. The reversal of 220749847 is 748947022.

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 220749847 - 2⁷ = 220749719 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220749877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5809188 + ... + 5809225.

It is an arithmetic number, because the mean of its divisors is an integer number (58092070).

Almost surely, 2^220749847 is an apocalyptic number.

220749847 is a deficient number, since it is larger than the sum of its proper divisors (11618433).

220749847 is a wasteful number, since it uses less digits than its factorization.

220749847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11618432.

The product of its (nonzero) digits is 225792, while the sum is 43.

The square root of 220749847 is about 14857.6528092428. The cubic root of 220749847 is about 604.3661571990.

The spelling of 220749847 in words is "two hundred twenty million, seven hundred forty-nine thousand, eight hundred forty-seven".