1442889691 has 4 divisors (see below), whose sum is σ = 1444796512. Its totient is φ = 1440982872.

The previous prime is 1442889683. The next prime is 1442889709. The reversal of 1442889691 is 1969882441.

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 1442889691 - 2³ = 1442889683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442889601) 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, 952275 + ... + 953788.

It is an arithmetic number, because the mean of its divisors is an integer number (361199128).

Almost surely, 2^1442889691 is an apocalyptic number.

1442889691 is a deficient number, since it is larger than the sum of its proper divisors (1906821).

1442889691 is an equidigital number, since it uses as much as digits as its factorization.

1442889691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1906820.

The product of its digits is 995328, while the sum is 52.

The square root of 1442889691 is about 37985.3878616502. The cubic root of 1442889691 is about 1129.9980919904.

The spelling of 1442889691 in words is "one billion, four hundred forty-two million, eight hundred eighty-nine thousand, six hundred ninety-one".