220739 has 4 divisors (see below), whose sum is σ = 223920. Its totient is φ = 217560.

The previous prime is 220721. The next prime is 220747. The reversal of 220739 is 937022.

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 220739 - 2¹⁶ = 155203 is a prime.

It is a super-2 number, since 2×220739² = 97451412242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220709) 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, 1484 + ... + 1625.

It is an arithmetic number, because the mean of its divisors is an integer number (55980).

2²²⁰⁷³⁹ is an apocalyptic number.

220739 is a deficient number, since it is larger than the sum of its proper divisors (3181).

220739 is an equidigital number, since it uses as much as digits as its factorization.

220739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 220739 is about 469.8286921847. The cubic root of 220739 is about 60.4356258110.

It can be divided in two parts, 220 and 739, that added together give a palindrome (959).

The spelling of 220739 in words is "two hundred twenty thousand, seven hundred thirty-nine".