7923281 has 2 divisors, whose sum is σ = 7923282. Its totient is φ = 7923280.

The previous prime is 7923277. The next prime is 7923299. The reversal of 7923281 is 1823297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6713281 + 1210000 = 2591^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 7923281 - 2² = 7923277 is a prime.

It is a super-2 number, since 2×7923281² = 125556763609922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (7923211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3961640 + 3961641.

It is an arithmetic number, because the mean of its divisors is an integer number (3961641).

Almost surely, 2^7923281 is an apocalyptic number.

It is an amenable number.

7923281 is a deficient number, since it is larger than the sum of its proper divisors (1).

7923281 is an equidigital number, since it uses as much as digits as its factorization.

7923281 is an evil number, because the sum of its binary digits is even.

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

The square root of 7923281 is about 2814.8323218266. The cubic root of 7923281 is about 199.3586203595.

The spelling of 7923281 in words is "seven million, nine hundred twenty-three thousand, two hundred eighty-one".