1481994439 has 4 divisors (see below), whose sum is σ = 1482838720. Its totient is φ = 1481150160.

The previous prime is 1481994407. The next prime is 1481994457. The reversal of 1481994439 is 9344991841.

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 1481994439 - 2⁵ = 1481994407 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 (1481994469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419502 + ... + 423019.

It is an arithmetic number, because the mean of its divisors is an integer number (370709680).

Almost surely, 2^1481994439 is an apocalyptic number.

1481994439 is a deficient number, since it is larger than the sum of its proper divisors (844281).

1481994439 is an equidigital number, since it uses as much as digits as its factorization.

1481994439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 844280.

The product of its digits is 1119744, while the sum is 52.

The square root of 1481994439 is about 38496.6808829021. The cubic root of 1481994439 is about 1140.1155210214.

The spelling of 1481994439 in words is "one billion, four hundred eighty-one million, nine hundred ninety-four thousand, four hundred thirty-nine".