1326738887 has 4 divisors (see below), whose sum is σ = 1327459056. Its totient is φ = 1326018720.

The previous prime is 1326738883. The next prime is 1326738949. The reversal of 1326738887 is 7888376231.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1326738887 - 2² = 1326738883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326738883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357314 + ... + 361007.

It is an arithmetic number, because the mean of its divisors is an integer number (331864764).

Almost surely, 2^1326738887 is an apocalyptic number.

1326738887 is a deficient number, since it is larger than the sum of its proper divisors (720169).

1326738887 is an equidigital number, since it uses as much as digits as its factorization.

1326738887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720168.

The product of its digits is 2709504, while the sum is 53.

The square root of 1326738887 is about 36424.4270648146. The cubic root of 1326738887 is about 1098.8248847566.

The spelling of 1326738887 in words is "one billion, three hundred twenty-six million, seven hundred thirty-eight thousand, eight hundred eighty-seven".