1326997807 has 2 divisors, whose sum is σ = 1326997808. Its totient is φ = 1326997806.

The previous prime is 1326997799. The next prime is 1326997817. The reversal of 1326997807 is 7087996231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1326997807 - 2³ = 1326997799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1326997817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 663498903 + 663498904.

It is an arithmetic number, because the mean of its divisors is an integer number (663498904).

Almost surely, 2^1326997807 is an apocalyptic number.

1326997807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1326997807 is an equidigital number, since it uses as much as digits as its factorization.

1326997807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 1326997807 is about 36427.9810996986. The cubic root of 1326997807 is about 1098.8963605725.

The spelling of 1326997807 in words is "one billion, three hundred twenty-six million, nine hundred ninety-seven thousand, eight hundred seven".