1326981893 has 2 divisors, whose sum is σ = 1326981894. Its totient is φ = 1326981892.

The previous prime is 1326981883. The next prime is 1326981899. The reversal of 1326981893 is 3981896231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 905829409 + 421152484 = 30097^2 + 20522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1326981893 - 2⁸ = 1326981637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326981899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663490946 + 663490947.

It is an arithmetic number, because the mean of its divisors is an integer number (663490947).

Almost surely, 2^1326981893 is an apocalyptic number.

It is an amenable number.

1326981893 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326981893 is an equidigital number, since it uses as much as digits as its factorization.

1326981893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 1326981893 is about 36427.7626680531. The cubic root of 1326981893 is about 1098.8919677226.

The spelling of 1326981893 in words is "one billion, three hundred twenty-six million, nine hundred eighty-one thousand, eight hundred ninety-three".