328747261 has 2 divisors, whose sum is σ = 328747262. Its totient is φ = 328747260.

The previous prime is 328747249. The next prime is 328747267. The reversal of 328747261 is 162747823.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228947161 + 99800100 = 15131^2 + 9990^2 .

It is a cyclic number.

It is not a de Polignac number, because 328747261 - 2⁹ = 328746749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328747267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164373630 + 164373631.

It is an arithmetic number, because the mean of its divisors is an integer number (164373631).

Almost surely, 2^328747261 is an apocalyptic number.

It is an amenable number.

328747261 is a deficient number, since it is larger than the sum of its proper divisors (1).

328747261 is an equidigital number, since it uses as much as digits as its factorization.

328747261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112896, while the sum is 40.

The square root of 328747261 is about 18131.3888326295. The cubic root of 328747261 is about 690.1667740819.

The spelling of 328747261 in words is "three hundred twenty-eight million, seven hundred forty-seven thousand, two hundred sixty-one".