1831089149 has 4 divisors (see below), whose sum is σ = 1856172636. Its totient is φ = 1806005664.

The previous prime is 1831089137. The next prime is 1831089157. The reversal of 1831089149 is 9419801381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9419801381 = 269 ⋅35017849.

It can be written as a sum of positive squares in 2 ways, for example, as 731702500 + 1099386649 = 27050^2 + 33157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1831089149 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 (1831089119) 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, 12541634 + ... + 12541779.

It is an arithmetic number, because the mean of its divisors is an integer number (464043159).

Almost surely, 2^1831089149 is an apocalyptic number.

It is an amenable number.

1831089149 is a deficient number, since it is larger than the sum of its proper divisors (25083487).

1831089149 is an equidigital number, since it uses as much as digits as its factorization.

1831089149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25083486.

The product of its (nonzero) digits is 62208, while the sum is 44.

The square root of 1831089149 is about 42791.2274771360. The cubic root of 1831089149 is about 1223.4038128229.

The spelling of 1831089149 in words is "one billion, eight hundred thirty-one million, eighty-nine thousand, one hundred forty-nine".