7227749 has 4 divisors (see below), whose sum is σ = 7234860. Its totient is φ = 7220640.

The previous prime is 7227739. The next prime is 7227751. The reversal of 7227749 is 9477227.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9477227 = 31 ⋅305717.

It can be written as a sum of positive squares in 2 ways, for example, as 6723649 + 504100 = 2593^2 + 710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7227749 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 (7227719) 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, 1712 + ... + 4169.

It is an arithmetic number, because the mean of its divisors is an integer number (1808715).

Almost surely, 2^7227749 is an apocalyptic number.

It is an amenable number.

7227749 is a deficient number, since it is larger than the sum of its proper divisors (7111).

7227749 is a wasteful number, since it uses less digits than its factorization.

7227749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110.

The product of its digits is 49392, while the sum is 38.

The square root of 7227749 is about 2688.4473214106. The cubic root of 7227749 is about 193.3456271083.

The spelling of 7227749 in words is "seven million, two hundred twenty-seven thousand, seven hundred forty-nine".