1140091831 has 4 divisors (see below), whose sum is σ = 1164349152. Its totient is φ = 1115834512.

The previous prime is 1140091829. The next prime is 1140091871. The reversal of 1140091831 is 1381900411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1381900411 = 523 ⋅2642257.

It is a cyclic number.

It is not a de Polignac number, because 1140091831 - 2¹ = 1140091829 is a prime.

It is a super-2 number, since 2×1140091831² = 2599618766225865122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1140091831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140091811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12128590 + ... + 12128683.

It is an arithmetic number, because the mean of its divisors is an integer number (291087288).

Almost surely, 2^1140091831 is an apocalyptic number.

1140091831 is a deficient number, since it is larger than the sum of its proper divisors (24257321).

1140091831 is an equidigital number, since it uses as much as digits as its factorization.

1140091831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24257320.

The product of its (nonzero) digits is 864, while the sum is 28.

The square root of 1140091831 is about 33765.2459046280. The cubic root of 1140091831 is about 1044.6719759804.

The spelling of 1140091831 in words is "one billion, one hundred forty million, ninety-one thousand, eight hundred thirty-one".