1327887921 has 8 divisors (see below), whose sum is σ = 1790411040. Its totient is φ = 875311712.

The previous prime is 1327887893. The next prime is 1327887923. The reversal of 1327887921 is 1297887231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1327887921 - 2⁷ = 1327887793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1327887923) 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 7 ways as a sum of consecutive naturals, for example, 2486415 + ... + 2486948.

It is an arithmetic number, because the mean of its divisors is an integer number (223801380).

Almost surely, 2^1327887921 is an apocalyptic number.

It is an amenable number.

1327887921 is a deficient number, since it is larger than the sum of its proper divisors (462523119).

1327887921 is an equidigital number, since it uses as much as digits as its factorization.

1327887921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4973455.

The product of its digits is 338688, while the sum is 48.

The square root of 1327887921 is about 36440.1965005679. The cubic root of 1327887921 is about 1099.1420089093.

The spelling of 1327887921 in words is "one billion, three hundred twenty-seven million, eight hundred eighty-seven thousand, nine hundred twenty-one".