1309797356 has 12 divisors (see below), whose sum is σ = 2619594768. Its totient is φ = 561341712.

The previous prime is 1309797289. The next prime is 1309797403. The reversal of 1309797356 is 6537979031.

1309797356 is an admirable number.

It is a super-2 number, since 2×1309797356² = 3431138227569181472, which contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 23389211 + ... + 23389266.

It is an arithmetic number, because the mean of its divisors is an integer number (218299564).

Almost surely, 2^1309797356 is an apocalyptic number.

It is an amenable number.

1309797356 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1309797356 is a wasteful number, since it uses less digits than its factorization.

1309797356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46778488 (or 46778486 counting only the distinct ones).

The product of its (nonzero) digits is 1071630, while the sum is 50.

The square root of 1309797356 is about 36191.1226131492. The cubic root of 1309797356 is about 1094.1277586426.

The spelling of 1309797356 in words is "one billion, three hundred nine million, seven hundred ninety-seven thousand, three hundred fifty-six".