8735821 has 2 divisors, whose sum is σ = 8735822. Its totient is φ = 8735820.

The previous prime is 8735813. The next prime is 8735827. The reversal of 8735821 is 1285378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5546025 + 3189796 = 2355^2 + 1786^2 .

It is a cyclic number.

It is not a de Polignac number, because 8735821 - 2³ = 8735813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8735827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4367910 + 4367911.

It is an arithmetic number, because the mean of its divisors is an integer number (4367911).

Almost surely, 2^8735821 is an apocalyptic number.

It is an amenable number.

8735821 is a deficient number, since it is larger than the sum of its proper divisors (1).

8735821 is an equidigital number, since it uses as much as digits as its factorization.

8735821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 34.

The square root of 8735821 is about 2955.6422313941. The cubic root of 8735821 is about 205.9528987106.

The spelling of 8735821 in words is "eight million, seven hundred thirty-five thousand, eight hundred twenty-one".