1081840379 has 4 divisors (see below), whose sum is σ = 1087884360. Its totient is φ = 1075796400.

The previous prime is 1081840337. The next prime is 1081840381. The reversal of 1081840379 is 9730481801.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9730481801 = 743 ⋅13096207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1081840379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1081840079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3021722 + ... + 3022079.

It is an arithmetic number, because the mean of its divisors is an integer number (271971090).

Almost surely, 2^1081840379 is an apocalyptic number.

1081840379 is a deficient number, since it is larger than the sum of its proper divisors (6043981).

1081840379 is an equidigital number, since it uses as much as digits as its factorization.

1081840379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6043980.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1081840379 is about 32891.3420066740. The cubic root of 1081840379 is about 1026.5680157760.

The spelling of 1081840379 in words is "one billion, eighty-one million, eight hundred forty thousand, three hundred seventy-nine".