981444423 has 4 divisors (see below), whose sum is σ = 1308592568. Its totient is φ = 654296280.

The previous prime is 981444403. The next prime is 981444463. The reversal of 981444423 is 324444189.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 981444423 - 2¹⁰ = 981443399 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 (981444403) 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, 163574068 + ... + 163574073.

It is an arithmetic number, because the mean of its divisors is an integer number (327148142).

Almost surely, 2^981444423 is an apocalyptic number.

981444423 is a deficient number, since it is larger than the sum of its proper divisors (327148145).

981444423 is a wasteful number, since it uses less digits than its factorization.

981444423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327148144.

The product of its digits is 110592, while the sum is 39.

The square root of 981444423 is about 31328.0133905743. The cubic root of 981444423 is about 993.7761517425.

The spelling of 981444423 in words is "nine hundred eighty-one million, four hundred forty-four thousand, four hundred twenty-three".