1481317891 has 4 divisors (see below), whose sum is σ = 1481476984. Its totient is φ = 1481158800.

The previous prime is 1481317867. The next prime is 1481317907. The reversal of 1481317891 is 1987131841.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1987131841 = 401 ⋅4955441.

It is a cyclic number.

It is not a de Polignac number, because 1481317891 - 2⁹ = 1481317379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1481317811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64650 + ... + 84511.

It is an arithmetic number, because the mean of its divisors is an integer number (370369246).

Almost surely, 2^1481317891 is an apocalyptic number.

1481317891 is a deficient number, since it is larger than the sum of its proper divisors (159093).

1481317891 is an equidigital number, since it uses as much as digits as its factorization.

1481317891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159092.

The product of its digits is 48384, while the sum is 43.

The square root of 1481317891 is about 38487.8927846147. The cubic root of 1481317891 is about 1139.9420025383.

The spelling of 1481317891 in words is "one billion, four hundred eighty-one million, three hundred seventeen thousand, eight hundred ninety-one".