328645249 has 2 divisors, whose sum is σ = 328645250. Its totient is φ = 328645248.

The previous prime is 328645231. The next prime is 328645301. The reversal of 328645249 is 942546823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 181387024 + 147258225 = 13468^2 + 12135^2 .

It is an emirp because it is prime and its reverse (942546823) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 328645249 - 2²¹ = 326548097 is a prime.

It is not a weakly prime, because it can be changed into another prime (328645349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164322624 + 164322625.

It is an arithmetic number, because the mean of its divisors is an integer number (164322625).

Almost surely, 2^328645249 is an apocalyptic number.

It is an amenable number.

328645249 is a deficient number, since it is larger than the sum of its proper divisors (1).

328645249 is an equidigital number, since it uses as much as digits as its factorization.

328645249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 43.

The square root of 328645249 is about 18128.5754818188. The cubic root of 328645249 is about 690.0953792396.

The spelling of 328645249 in words is "three hundred twenty-eight million, six hundred forty-five thousand, two hundred forty-nine".