7922381 has 4 divisors (see below), whose sum is σ = 7929564. Its totient is φ = 7915200.

The previous prime is 7922371. The next prime is 7922399. The reversal of 7922381 is 1832297.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 4182025 + 3740356 = 2045^2 + 1934^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7922381 is a prime.

It is a super-2 number, since 2×7922381² = 125528241418322, 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 (7922311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1550 + ... + 4271.

It is an arithmetic number, because the mean of its divisors is an integer number (1982391).

Almost surely, 2^7922381 is an apocalyptic number.

It is an amenable number.

7922381 is a deficient number, since it is larger than the sum of its proper divisors (7183).

7922381 is a wasteful number, since it uses less digits than its factorization.

7922381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its digits is 6048, while the sum is 32.

The square root of 7922381 is about 2814.6724498598. The cubic root of 7922381 is about 199.3510717378.

The spelling of 7922381 in words is "seven million, nine hundred twenty-two thousand, three hundred eighty-one".