1331323193 has 4 divisors (see below), whose sum is σ = 1409636340. Its totient is φ = 1253010048.

The previous prime is 1331323181. The next prime is 1331323207. The reversal of 1331323193 is 3913231331.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 590830249 + 740492944 = 24307^2 + 27212^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331323193 - 2²² = 1327128889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331323153) 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, 39156548 + ... + 39156581.

It is an arithmetic number, because the mean of its divisors is an integer number (352409085).

Almost surely, 2^1331323193 is an apocalyptic number.

It is an amenable number.

1331323193 is a deficient number, since it is larger than the sum of its proper divisors (78313147).

1331323193 is an equidigital number, since it uses as much as digits as its factorization.

1331323193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78313146.

The product of its digits is 4374, while the sum is 29.

The square root of 1331323193 is about 36487.3018048745. The cubic root of 1331323193 is about 1100.0890266789.

The spelling of 1331323193 in words is "one billion, three hundred thirty-one million, three hundred twenty-three thousand, one hundred ninety-three".