7263821 has 2 divisors, whose sum is σ = 7263822. Its totient is φ = 7263820.

The previous prime is 7263799. The next prime is 7263829. The reversal of 7263821 is 1283627.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6916900 + 346921 = 2630^2 + 589^2 .

It is a cyclic number.

It is not a de Polignac number, because 7263821 - 2¹⁰ = 7262797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7263829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3631910 + 3631911.

It is an arithmetic number, because the mean of its divisors is an integer number (3631911).

Almost surely, 2^7263821 is an apocalyptic number.

It is an amenable number.

7263821 is a deficient number, since it is larger than the sum of its proper divisors (1).

7263821 is an equidigital number, since it uses as much as digits as its factorization.

7263821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 7263821 is about 2695.1476768444. The cubic root of 7263821 is about 193.6667410565. Note that the first 3 decimals are identical.

The spelling of 7263821 in words is "seven million, two hundred sixty-three thousand, eight hundred twenty-one".