32630821 has 2 divisors, whose sum is σ = 32630822. Its totient is φ = 32630820.

The previous prime is 32630789. The next prime is 32630867. The reversal of 32630821 is 12803623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17892900 + 14737921 = 4230^2 + 3839^2 .

It is a cyclic number.

It is not a de Polignac number, because 32630821 - 2⁵ = 32630789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32637821) 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 as a sum of consecutive naturals, namely, 16315410 + 16315411.

It is an arithmetic number, because the mean of its divisors is an integer number (16315411).

Almost surely, 2^32630821 is an apocalyptic number.

It is an amenable number.

32630821 is a deficient number, since it is larger than the sum of its proper divisors (1).

32630821 is an equidigital number, since it uses as much as digits as its factorization.

32630821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 32630821 is about 5712.3393631681. The cubic root of 32630821 is about 319.5528291867.

The spelling of 32630821 in words is "thirty-two million, six hundred thirty thousand, eight hundred twenty-one".