328614821 has 2 divisors, whose sum is σ = 328614822. Its totient is φ = 328614820.

The previous prime is 328614809. The next prime is 328614851. The reversal of 328614821 is 128416823.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188073796 + 140541025 = 13714^2 + 11855^2 .

It is a cyclic number.

It is not a de Polignac number, because 328614821 - 2²⁶ = 261505957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (328614851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164307410 + 164307411.

It is an arithmetic number, because the mean of its divisors is an integer number (164307411).

Almost surely, 2^328614821 is an apocalyptic number.

It is an amenable number.

328614821 is a deficient number, since it is larger than the sum of its proper divisors (1).

328614821 is an equidigital number, since it uses as much as digits as its factorization.

328614821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18432, while the sum is 35.

The square root of 328614821 is about 18127.7362348419. The cubic root of 328614821 is about 690.0740808230.

The spelling of 328614821 in words is "three hundred twenty-eight million, six hundred fourteen thousand, eight hundred twenty-one".