2081444399 has 4 divisors (see below), whose sum is σ = 2093072760. Its totient is φ = 2069816040.

The previous prime is 2081444389. The next prime is 2081444437. The reversal of 2081444399 is 9934441802.

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 2081444399 - 2¹² = 2081440303 is a prime.

It is a super-2 number, since 2×2081444399² = 8664821572256942402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2081444329) 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, 5813912 + ... + 5814269.

It is an arithmetic number, because the mean of its divisors is an integer number (523268190).

Almost surely, 2^2081444399 is an apocalyptic number.

2081444399 is a deficient number, since it is larger than the sum of its proper divisors (11628361).

2081444399 is a wasteful number, since it uses less digits than its factorization.

2081444399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11628360.

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 2081444399 is about 45622.8495274024. The cubic root of 2081444399 is about 1276.7962684167.

The spelling of 2081444399 in words is "two billion, eighty-one million, four hundred forty-four thousand, three hundred ninety-nine".