328720237 has 2 divisors, whose sum is σ = 328720238. Its totient is φ = 328720236.

The previous prime is 328720153. The next prime is 328720267. The reversal of 328720237 is 732027823.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 313502436 + 15217801 = 17706^2 + 3901^2 .

It is a cyclic number.

It is not a de Polignac number, because 328720237 - 2²⁷ = 194502509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328720267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164360118 + 164360119.

It is an arithmetic number, because the mean of its divisors is an integer number (164360119).

Almost surely, 2^328720237 is an apocalyptic number.

It is an amenable number.

328720237 is a deficient number, since it is larger than the sum of its proper divisors (1).

328720237 is an equidigital number, since it uses as much as digits as its factorization.

328720237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 328720237 is about 18130.6435903417. The cubic root of 328720237 is about 690.1478623117.

The spelling of 328720237 in words is "three hundred twenty-eight million, seven hundred twenty thousand, two hundred thirty-seven".