1328923619 has 2 divisors, whose sum is σ = 1328923620. Its totient is φ = 1328923618.

The previous prime is 1328923591. The next prime is 1328923639. The reversal of 1328923619 is 9163298231.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1328923619 is a prime.

It is a super-2 number, since 2×1328923619² = 3532075970272114322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1328923619.

It is not a weakly prime, because it can be changed into another prime (1328923639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664461809 + 664461810.

It is an arithmetic number, because the mean of its divisors is an integer number (664461810).

Almost surely, 2^1328923619 is an apocalyptic number.

1328923619 is a deficient number, since it is larger than the sum of its proper divisors (1).

1328923619 is an equidigital number, since it uses as much as digits as its factorization.

1328923619 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 1328923619 is about 36454.4046584223. The cubic root of 1328923619 is about 1099.4276965108.

The spelling of 1328923619 in words is "one billion, three hundred twenty-eight million, nine hundred twenty-three thousand, six hundred nineteen".