32790421 has 2 divisors, whose sum is σ = 32790422. Its totient is φ = 32790420.

The previous prime is 32790419. The next prime is 32790449. The reversal of 32790421 is 12409723.

It is an a-pointer prime, because the next prime (32790449) can be obtained adding 32790421 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32649796 + 140625 = 5714^2 + 375^2 .

It is an emirp because it is prime and its reverse (12409723) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32790421 - 2¹ = 32790419 is a prime.

Together with 32790419, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 32790421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32790491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16395210 + 16395211.

It is an arithmetic number, because the mean of its divisors is an integer number (16395211).

Almost surely, 2^32790421 is an apocalyptic number.

It is an amenable number.

32790421 is a deficient number, since it is larger than the sum of its proper divisors (1).

32790421 is an equidigital number, since it uses as much as digits as its factorization.

32790421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 32790421 is about 5726.2920812686. The cubic root of 32790421 is about 320.0729683861.

The spelling of 32790421 in words is "thirty-two million, seven hundred ninety thousand, four hundred twenty-one".