1081344399 has 16 divisors (see below), whose sum is σ = 1452195840. Its totient is φ = 715710240.

The previous prime is 1081344353. The next prime is 1081344409. The reversal of 1081344399 is 9934431801.

It is not a de Polignac number, because 1081344399 - 2¹⁷ = 1081213327 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1081344399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1081344899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 346257 + ... + 349365.

It is an arithmetic number, because the mean of its divisors is an integer number (90762240).

Almost surely, 2^1081344399 is an apocalyptic number.

1081344399 is a deficient number, since it is larger than the sum of its proper divisors (370851441).

1081344399 is a wasteful number, since it uses less digits than its factorization.

1081344399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 1081344399 is about 32883.8014682001. The cubic root of 1081344399 is about 1026.4111118422.

The spelling of 1081344399 in words is "one billion, eighty-one million, three hundred forty-four thousand, three hundred ninety-nine".