220846729 has 4 divisors (see below), whose sum is σ = 222990976. Its totient is φ = 218702484.

The previous prime is 220846721. The next prime is 220846739. The reversal of 220846729 is 927648022.

220846729 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 220846729 - 2³ = 220846721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220846691 and 220846700.

It is not an unprimeable number, because it can be changed into a prime (220846721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1071969 + ... + 1072174.

It is an arithmetic number, because the mean of its divisors is an integer number (55747744).

Almost surely, 2^220846729 is an apocalyptic number.

It is an amenable number.

220846729 is a deficient number, since it is larger than the sum of its proper divisors (2144247).

220846729 is a wasteful number, since it uses less digits than its factorization.

220846729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144246.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 220846729 is about 14860.9127916155. The cubic root of 220846729 is about 604.4545583752.

The spelling of 220846729 in words is "two hundred twenty million, eight hundred forty-six thousand, seven hundred twenty-nine".