1427827891 has 16 divisors (see below), whose sum is σ = 1678251456. Its totient is φ = 1189109376.

The previous prime is 1427827889. The next prime is 1427827931. The reversal of 1427827891 is 1987287241.

It is not a de Polignac number, because 1427827891 - 2¹ = 1427827889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1427827861) 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 15 ways as a sum of consecutive naturals, for example, 202965 + ... + 209881.

It is an arithmetic number, because the mean of its divisors is an integer number (104890716).

Almost surely, 2^1427827891 is an apocalyptic number.

1427827891 is a deficient number, since it is larger than the sum of its proper divisors (250423565).

1427827891 is an equidigital number, since it uses as much as digits as its factorization.

1427827891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7758.

The product of its digits is 451584, while the sum is 49.

The square root of 1427827891 is about 37786.6099432061. The cubic root of 1427827891 is about 1126.0524514244.

The spelling of 1427827891 in words is "one billion, four hundred twenty-seven million, eight hundred twenty-seven thousand, eight hundred ninety-one".