1331968841 has 4 divisors (see below), whose sum is σ = 1522250112. Its totient is φ = 1141687572.

The previous prime is 1331968829. The next prime is 1331968843. The reversal of 1331968841 is 1488691331.

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: 1488691331 = 31 ⋅48022301.

It is a cyclic number.

It is not a de Polignac number, because 1331968841 - 2¹⁰ = 1331967817 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331968792 and 1331968801.

It is not an unprimeable number, because it can be changed into a prime (1331968843) 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, 95140625 + ... + 95140638.

It is an arithmetic number, because the mean of its divisors is an integer number (380562528).

Almost surely, 2^1331968841 is an apocalyptic number.

It is an amenable number.

1331968841 is a deficient number, since it is larger than the sum of its proper divisors (190281271).

1331968841 is an equidigital number, since it uses as much as digits as its factorization.

1331968841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190281270.

The product of its digits is 124416, while the sum is 44.

The square root of 1331968841 is about 36496.1483036224. The cubic root of 1331968841 is about 1100.2668336144.

The spelling of 1331968841 in words is "one billion, three hundred thirty-one million, nine hundred sixty-eight thousand, eight hundred forty-one".