1331963383 has 4 divisors (see below), whose sum is σ = 1332511488. Its totient is φ = 1331415280.

The previous prime is 1331963371. The next prime is 1331963389. The reversal of 1331963383 is 3833691331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3833691331 = 1669 ⋅2296999.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331963383 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331963389) 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, 270391 + ... + 275272.

It is an arithmetic number, because the mean of its divisors is an integer number (333127872).

Almost surely, 2^1331963383 is an apocalyptic number.

1331963383 is a deficient number, since it is larger than the sum of its proper divisors (548105).

1331963383 is an equidigital number, since it uses as much as digits as its factorization.

1331963383 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548104.

The product of its digits is 104976, while the sum is 40.

The square root of 1331963383 is about 36496.0735285318. The cubic root of 1331963383 is about 1100.2653307603.

The spelling of 1331963383 in words is "one billion, three hundred thirty-one million, nine hundred sixty-three thousand, three hundred eighty-three".