1326321497 has 2 divisors, whose sum is σ = 1326321498. Its totient is φ = 1326321496.

The previous prime is 1326321457. The next prime is 1326321517. The reversal of 1326321497 is 7941236231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1073479696 + 252841801 = 32764^2 + 15901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1326321497 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1326321497.

It is not a weakly prime, because it can be changed into another prime (1326321457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663160748 + 663160749.

It is an arithmetic number, because the mean of its divisors is an integer number (663160749).

Almost surely, 2^1326321497 is an apocalyptic number.

It is an amenable number.

1326321497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326321497 is an equidigital number, since it uses as much as digits as its factorization.

1326321497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 1326321497 is about 36418.6970799341. The cubic root of 1326321497 is about 1098.7096431349.

The spelling of 1326321497 in words is "one billion, three hundred twenty-six million, three hundred twenty-one thousand, four hundred ninety-seven".