1081373999 has 8 divisors (see below), whose sum is σ = 1159766640. Its totient is φ = 1005129216.

The previous prime is 1081373977. The next prime is 1081374043. The reversal of 1081373999 is 9993731801.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1081373999 - 2¹² = 1081369903 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 (1081373959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 535922 + ... + 537935.

It is an arithmetic number, because the mean of its divisors is an integer number (144970830).

Almost surely, 2^1081373999 is an apocalyptic number.

1081373999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1081373999 is a deficient number, since it is larger than the sum of its proper divisors (78392641).

1081373999 is a wasteful number, since it uses less digits than its factorization.

1081373999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073929.

The product of its (nonzero) digits is 367416, while the sum is 50.

The square root of 1081373999 is about 32884.2515347392. The cubic root of 1081373999 is about 1026.4204771877.

The spelling of 1081373999 in words is "one billion, eighty-one million, three hundred seventy-three thousand, nine hundred ninety-nine".