1831996139 has 4 divisors (see below), whose sum is σ = 1832294640. Its totient is φ = 1831697640.

The previous prime is 1831996121. The next prime is 1831996141. The reversal of 1831996139 is 9316991381.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9316991381 = 103 ⋅90456227.

It is a cyclic number.

It is not a de Polignac number, because 1831996139 - 2²⁸ = 1563560683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1831992139) 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, 139847 + ... + 152384.

It is an arithmetic number, because the mean of its divisors is an integer number (458073660).

Almost surely, 2^1831996139 is an apocalyptic number.

1831996139 is a deficient number, since it is larger than the sum of its proper divisors (298501).

1831996139 is an equidigital number, since it uses as much as digits as its factorization.

1831996139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298500.

The product of its digits is 314928, while the sum is 50.

The square root of 1831996139 is about 42801.8240148711. The cubic root of 1831996139 is about 1223.6057749297.

The spelling of 1831996139 in words is "one billion, eight hundred thirty-one million, nine hundred ninety-six thousand, one hundred thirty-nine".