7922681 has 4 divisors (see below), whose sum is σ = 8532132. Its totient is φ = 7313232.

The previous prime is 7922653. The next prime is 7922689. The reversal of 7922681 is 1862297.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2706025 + 5216656 = 1645^2 + 2284^2 .

It is a cyclic number.

It is not a de Polignac number, because 7922681 - 2²² = 3728377 is a prime.

It is a super-2 number, since 2×7922681² = 125537748455522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7922689) 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, 304706 + ... + 304731.

It is an arithmetic number, because the mean of its divisors is an integer number (2133033).

Almost surely, 2^7922681 is an apocalyptic number.

It is an amenable number.

7922681 is a deficient number, since it is larger than the sum of its proper divisors (609451).

7922681 is a wasteful number, since it uses less digits than its factorization.

7922681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609450.

The product of its digits is 12096, while the sum is 35.

The square root of 7922681 is about 2814.7257415244. The cubic root of 7922681 is about 199.3535880085.

The spelling of 7922681 in words is "seven million, nine hundred twenty-two thousand, six hundred eighty-one".