328781507 has 2 divisors, whose sum is σ = 328781508. Its totient is φ = 328781506.

The previous prime is 328781503. The next prime is 328781533. The reversal of 328781507 is 705187823.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 328781507 - 2² = 328781503 is a prime.

It is not a weakly prime, because it can be changed into another prime (328781503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164390753 + 164390754.

It is an arithmetic number, because the mean of its divisors is an integer number (164390754).

Almost surely, 2^328781507 is an apocalyptic number.

328781507 is a deficient number, since it is larger than the sum of its proper divisors (1).

328781507 is an equidigital number, since it uses as much as digits as its factorization.

328781507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 328781507 is about 18132.3331923942. Note that the first 3 decimals coincide. The cubic root of 328781507 is about 690.1907384192.

The spelling of 328781507 in words is "three hundred twenty-eight million, seven hundred eighty-one thousand, five hundred seven".