1923313481 has 4 divisors (see below), whose sum is σ = 1923623700. Its totient is φ = 1923003264.

The previous prime is 1923313451. The next prime is 1923313519. The reversal of 1923313481 is 1843133291.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1843133291 = 3823 ⋅482117.

It can be written as a sum of positive squares in 2 ways, for example, as 1323504400 + 599809081 = 36380^2 + 24491^2 .

It is a cyclic number.

It is not a de Polignac number, because 1923313481 - 2²² = 1919119177 is a prime.

It is a super-2 number, since 2×1923313481² = 7398269492392674722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1923313451) 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, 145616 + ... + 158273.

It is an arithmetic number, because the mean of its divisors is an integer number (480905925).

Almost surely, 2^1923313481 is an apocalyptic number.

It is an amenable number.

1923313481 is a deficient number, since it is larger than the sum of its proper divisors (310219).

1923313481 is an equidigital number, since it uses as much as digits as its factorization.

1923313481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310218.

The product of its digits is 15552, while the sum is 35.

The square root of 1923313481 is about 43855.5980577166. The cubic root of 1923313481 is about 1243.6075745229.

The spelling of 1923313481 in words is "one billion, nine hundred twenty-three million, three hundred thirteen thousand, four hundred eighty-one".