7220869 has 4 divisors (see below), whose sum is σ = 7645644. Its totient is φ = 6796096.

The previous prime is 7220867. The next prime is 7220891. The reversal of 7220869 is 9680227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9680227 = 67 ⋅144481.

It can be written as a sum of positive squares in 2 ways, for example, as 5688225 + 1532644 = 2385^2 + 1238^2 .

It is a cyclic number.

It is not a de Polignac number, because 7220869 - 2¹ = 7220867 is a prime.

It is a super-2 number, since 2×7220869² = 104281898230322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7220867) 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, 212362 + ... + 212395.

It is an arithmetic number, because the mean of its divisors is an integer number (1911411).

Almost surely, 2^7220869 is an apocalyptic number.

It is an amenable number.

7220869 is a deficient number, since it is larger than the sum of its proper divisors (424775).

7220869 is a wasteful number, since it uses less digits than its factorization.

7220869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424774.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 7220869 is about 2687.1674677995. The cubic root of 7220869 is about 193.2842599058.

The spelling of 7220869 in words is "seven million, two hundred twenty thousand, eight hundred sixty-nine".