1000730243081 has 4 divisors (see below), whose sum is σ = 1017135656964. Its totient is φ = 984324829200.

The previous prime is 1000730243059. The next prime is 1000730243083. The reversal of 1000730243081 is 1803420370001.

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

It can be written as a sum of positive squares in 2 ways, for example, as 579151440400 + 421578802681 = 761020^2 + 649291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000730243081 is a prime.

It is a super-3 number, since 3×1000730243081³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1000730243083) 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, 8202706850 + ... + 8202706971.

It is an arithmetic number, because the mean of its divisors is an integer number (254283914241).

Almost surely, 2^{1000730243081} is an apocalyptic number.

It is an amenable number.

1000730243081 is a deficient number, since it is larger than the sum of its proper divisors (16405413883).

1000730243081 is an equidigital number, since it uses as much as digits as its factorization.

1000730243081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16405413882.

The product of its (nonzero) digits is 4032, while the sum is 29.

The spelling of 1000730243081 in words is "one trillion, seven hundred thirty million, two hundred forty-three thousand, eighty-one".