1321309884 has 12 divisors (see below), whose sum is σ = 3083056424. Its totient is φ = 440436624.

The previous prime is 1321309883. The next prime is 1321309889. The reversal of 1321309884 is 4889031231.

1321309884 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321309883) 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, 55054567 + ... + 55054590.

Almost surely, 2^1321309884 is an apocalyptic number.

It is an amenable number.

1321309884 is an abundant number, since it is smaller than the sum of its proper divisors (1761746540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321309884 is a wasteful number, since it uses less digits than its factorization.

1321309884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110109164 (or 110109162 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 1321309884 is about 36349.8264645101. The cubic root of 1321309884 is about 1097.3240420617.

The spelling of 1321309884 in words is "one billion, three hundred twenty-one million, three hundred nine thousand, eight hundred eighty-four".