1321287093 has 32 divisors (see below), whose sum is σ = 2238796800. Its totient is φ = 754448688.

The previous prime is 1321287089. The next prime is 1321287137. The reversal of 1321287093 is 3907821231.

It is not a de Polignac number, because 1321287093 - 2² = 1321287089 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321287293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 463330 + ... + 466172.

It is an arithmetic number, because the mean of its divisors is an integer number (69962400).

Almost surely, 2^1321287093 is an apocalyptic number.

It is an amenable number.

1321287093 is a deficient number, since it is larger than the sum of its proper divisors (917509707).

1321287093 is a wasteful number, since it uses less digits than its factorization.

1321287093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5318 (or 5312 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 1321287093 is about 36349.5129678514. The cubic root of 1321287093 is about 1097.3177328539.

The spelling of 1321287093 in words is "one billion, three hundred twenty-one million, two hundred eighty-seven thousand, ninety-three".