1312023202309 has 16 divisors (see below), whose sum is σ = 1327920168960. Its totient is φ = 1296196403760.

The previous prime is 1312023202283. The next prime is 1312023202319. The reversal of 1312023202309 is 9032023202131.

It is a cyclic number.

It is not a de Polignac number, because 1312023202309 - 2²³ = 1312014813701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312023202319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127338652 + ... + 127348954.

It is an arithmetic number, because the mean of its divisors is an integer number (82995010560).

Almost surely, 2^{1312023202309} is an apocalyptic number.

It is an amenable number.

1312023202309 is a deficient number, since it is larger than the sum of its proper divisors (15896966651).

1312023202309 is a wasteful number, since it uses less digits than its factorization.

1312023202309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13560.

The product of its (nonzero) digits is 3888, while the sum is 28.

The spelling of 1312023202309 in words is "one trillion, three hundred twelve billion, twenty-three million, two hundred two thousand, three hundred nine".