32872321 has 2 divisors, whose sum is σ = 32872322. Its totient is φ = 32872320.

The previous prime is 32872309. The next prime is 32872327. The reversal of 32872321 is 12327823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28206721 + 4665600 = 5311^2 + 2160^2 .

It is an emirp because it is prime and its reverse (12327823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32872321 - 2⁵ = 32872289 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 32872321.

It is not a weakly prime, because it can be changed into another prime (32872327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16436160 + 16436161.

It is an arithmetic number, because the mean of its divisors is an integer number (16436161).

Almost surely, 2^32872321 is an apocalyptic number.

It is an amenable number.

32872321 is a deficient number, since it is larger than the sum of its proper divisors (1).

32872321 is an equidigital number, since it uses as much as digits as its factorization.

32872321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 32872321 is about 5733.4388459283. The cubic root of 32872321 is about 320.3392268525.

The spelling of 32872321 in words is "thirty-two million, eight hundred seventy-two thousand, three hundred twenty-one".