1331749863 has 16 divisors (see below), whose sum is σ = 2036608000. Its totient is φ = 859192920.

The previous prime is 1331749849. The next prime is 1331749871. The reversal of 1331749863 is 3689471331.

It is not a de Polignac number, because 1331749863 - 2¹⁴ = 1331733479 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 (1331749873) 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, 794713 + ... + 796386.

It is an arithmetic number, because the mean of its divisors is an integer number (127288000).

Almost surely, 2^1331749863 is an apocalyptic number.

1331749863 is a deficient number, since it is larger than the sum of its proper divisors (704858137).

1331749863 is a wasteful number, since it uses less digits than its factorization.

1331749863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591139 (or 1591133 counting only the distinct ones).

The product of its digits is 326592, while the sum is 45.

The square root of 1331749863 is about 36493.1481651008. The cubic root of 1331749863 is about 1100.2065350479.

The spelling of 1331749863 in words is "one billion, three hundred thirty-one million, seven hundred forty-nine thousand, eight hundred sixty-three".