32321813 has 2 divisors, whose sum is σ = 32321814. Its totient is φ = 32321812.

The previous prime is 32321789. The next prime is 32321833. The reversal of 32321813 is 31812323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30228004 + 2093809 = 5498^2 + 1447^2 .

It is a cyclic number.

It is not a de Polignac number, because 32321813 - 2⁶ = 32321749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32321833) 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, 16160906 + 16160907.

It is an arithmetic number, because the mean of its divisors is an integer number (16160907).

Almost surely, 2^32321813 is an apocalyptic number.

It is an amenable number.

32321813 is a deficient number, since it is larger than the sum of its proper divisors (1).

32321813 is an equidigital number, since it uses as much as digits as its factorization.

32321813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 23.

The square root of 32321813 is about 5685.2276119783. The cubic root of 32321813 is about 318.5409256648.

The spelling of 32321813 in words is "thirty-two million, three hundred twenty-one thousand, eight hundred thirteen".