1328904979 has 2 divisors, whose sum is σ = 1328904980. Its totient is φ = 1328904978.

The previous prime is 1328904959. The next prime is 1328905021. The reversal of 1328904979 is 9794098231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1328904979 - 2¹³ = 1328896787 is a prime.

It is not a weakly prime, because it can be changed into another prime (1328904959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664452489 + 664452490.

It is an arithmetic number, because the mean of its divisors is an integer number (664452490).

Almost surely, 2^1328904979 is an apocalyptic number.

1328904979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328904979 is an equidigital number, since it uses as much as digits as its factorization.

1328904979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 1328904979 is about 36454.1489956905. The cubic root of 1328904979 is about 1099.4225561532.

The spelling of 1328904979 in words is "one billion, three hundred twenty-eight million, nine hundred four thousand, nine hundred seventy-nine".