1329281879 has 2 divisors, whose sum is σ = 1329281880. Its totient is φ = 1329281878.

The previous prime is 1329281861. The next prime is 1329281897. The reversal of 1329281879 is 9781829231.

Together with next prime (1329281897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (1329281861) and next prime (1329281897).

It is a cyclic number.

It is not a de Polignac number, because 1329281879 - 2¹² = 1329277783 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1329281179) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664640939 + 664640940.

It is an arithmetic number, because the mean of its divisors is an integer number (664640940).

Almost surely, 2^1329281879 is an apocalyptic number.

1329281879 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329281879 is an equidigital number, since it uses as much as digits as its factorization.

1329281879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 50.

The square root of 1329281879 is about 36459.3181367946. The cubic root of 1329281879 is about 1099.5264846255.

The spelling of 1329281879 in words is "one billion, three hundred twenty-nine million, two hundred eighty-one thousand, eight hundred seventy-nine".