1309397912 has 32 divisors (see below), whose sum is σ = 2564218080. Its totient is φ = 625658880.

The previous prime is 1309397909. The next prime is 1309397923. The reversal of 1309397912 is 2197939031.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251528 + ... + 256680.

It is an arithmetic number, because the mean of its divisors is an integer number (80131815).

Almost surely, 2^1309397912 is an apocalyptic number.

It is an amenable number.

1309397912 is a deficient number, since it is larger than the sum of its proper divisors (1254820168).

1309397912 is a wasteful number, since it uses less digits than its factorization.

1309397912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563 (or 6559 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 1309397912 is about 36185.6036567030. The cubic root of 1309397912 is about 1094.0165233176.

The spelling of 1309397912 in words is "one billion, three hundred nine million, three hundred ninety-seven thousand, nine hundred twelve".