1309481764 has 24 divisors (see below), whose sum is σ = 2332981728. Its totient is φ = 643019520.

The previous prime is 1309481749. The next prime is 1309481857. The reversal of 1309481764 is 4671849031.

It is a self number, because there is not a number n which added to its sum of digits gives 1309481764.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37947 + ... + 63709.

It is an arithmetic number, because the mean of its divisors is an integer number (97207572).

Almost surely, 2^1309481764 is an apocalyptic number.

It is an amenable number.

1309481764 is a deficient number, since it is larger than the sum of its proper divisors (1023499964).

1309481764 is a wasteful number, since it uses less digits than its factorization.

1309481764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25995 (or 25993 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 1309481764 is about 36186.7622757273. The cubic root of 1309481764 is about 1094.0398759121.

The spelling of 1309481764 in words is "one billion, three hundred nine million, four hundred eighty-one thousand, seven hundred sixty-four".