1328923019 has 2 divisors, whose sum is σ = 1328923020. Its totient is φ = 1328923018.

The previous prime is 1328922971. The next prime is 1328923027. The reversal of 1328923019 is 9103298231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1328923019 - 2²⁸ = 1060487563 is a prime.

It is a super-2 number, since 2×1328923019² = 3532072780856148722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1328923619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664461509 + 664461510.

It is an arithmetic number, because the mean of its divisors is an integer number (664461510).

Almost surely, 2^1328923019 is an apocalyptic number.

1328923019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328923019 is an equidigital number, since it uses as much as digits as its factorization.

1328923019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 1328923019 is about 36454.3964289631. The cubic root of 1328923019 is about 1099.4275310494.

The spelling of 1328923019 in words is "one billion, three hundred twenty-eight million, nine hundred twenty-three thousand, nineteen".