7220659 has 4 divisors (see below), whose sum is σ = 7301880. Its totient is φ = 7139440.

The previous prime is 7220621. The next prime is 7220671. The reversal of 7220659 is 9560227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9560227 = 29 ⋅329663.

It is a cyclic number.

It is not a de Polignac number, because 7220659 - 2⁷ = 7220531 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7220659.

It is not an unprimeable number, because it can be changed into a prime (7223659) 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, 40477 + ... + 40654.

It is an arithmetic number, because the mean of its divisors is an integer number (1825470).

Almost surely, 2^7220659 is an apocalyptic number.

7220659 is a deficient number, since it is larger than the sum of its proper divisors (81221).

7220659 is an equidigital number, since it uses as much as digits as its factorization.

7220659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81220.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 7220659 is about 2687.1283929131. The cubic root of 7220659 is about 193.2823861660.

The spelling of 7220659 in words is "seven million, two hundred twenty thousand, six hundred fifty-nine".