1319323081 has 4 divisors (see below), whose sum is σ = 1325239552. Its totient is φ = 1313406612.

The previous prime is 1319323073. The next prime is 1319323099. The reversal of 1319323081 is 1803239131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1803239131 = 151 ⋅11941981.

It is a cyclic number.

It is not a de Polignac number, because 1319323081 - 2³ = 1319323073 is a prime.

It is a super-2 number, since 2×1319323081² = 3481226784118665122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1319323001) 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, 2957901 + ... + 2958346.

It is an arithmetic number, because the mean of its divisors is an integer number (331309888).

Almost surely, 2^1319323081 is an apocalyptic number.

It is an amenable number.

1319323081 is a deficient number, since it is larger than the sum of its proper divisors (5916471).

1319323081 is an equidigital number, since it uses as much as digits as its factorization.

1319323081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916470.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 1319323081 is about 36322.4872634020. The cubic root of 1319323081 is about 1096.7737647994.

The spelling of 1319323081 in words is "one billion, three hundred nineteen million, three hundred twenty-three thousand, eighty-one".