1312232109 has 16 divisors (see below), whose sum is σ = 1782855360. Its totient is φ = 858366080.

The previous prime is 1312232099. The next prime is 1312232111. The reversal of 1312232109 is 9012322131.

1312232109 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1312232109 - 2⁷ = 1312231981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312232149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16219 + ... + 53735.

It is an arithmetic number, because the mean of its divisors is an integer number (111428460).

Almost surely, 2^1312232109 is an apocalyptic number.

It is an amenable number.

1312232109 is a deficient number, since it is larger than the sum of its proper divisors (470623251).

1312232109 is a wasteful number, since it uses less digits than its factorization.

1312232109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37740.

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 1312232109 is about 36224.7444297403. The cubic root of 1312232109 is about 1094.8052888708.

The spelling of 1312232109 in words is "one billion, three hundred twelve million, two hundred thirty-two thousand, one hundred nine".