1331189839 has 16 divisors (see below), whose sum is σ = 1530934848. Its totient is φ = 1133862912.

The previous prime is 1331189779. The next prime is 1331189843. The reversal of 1331189839 is 9389811331.

It is a happy number.

It is not a de Polignac number, because 1331189839 - 2¹³ = 1331181647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331186839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1217377 + ... + 1218469.

It is an arithmetic number, because the mean of its divisors is an integer number (95683428).

Almost surely, 2^1331189839 is an apocalyptic number.

1331189839 is a deficient number, since it is larger than the sum of its proper divisors (199745009).

1331189839 is a wasteful number, since it uses less digits than its factorization.

1331189839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2034.

The product of its digits is 139968, while the sum is 46.

The square root of 1331189839 is about 36485.4743562421. The cubic root of 1331189839 is about 1100.0522947590.

The spelling of 1331189839 in words is "one billion, three hundred thirty-one million, one hundred eighty-nine thousand, eight hundred thirty-nine".