1312032109 has 2 divisors, whose sum is σ = 1312032110. Its totient is φ = 1312032108.

The previous prime is 1312032107. The next prime is 1312032121. The reversal of 1312032109 is 9012302131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1137712900 + 174319209 = 33730^2 + 13203^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312032109 - 2¹ = 1312032107 is a prime.

Together with 1312032107, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1312032109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312032101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656016054 + 656016055.

It is an arithmetic number, because the mean of its divisors is an integer number (656016055).

Almost surely, 2^1312032109 is an apocalyptic number.

It is an amenable number.

1312032109 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312032109 is an equidigital number, since it uses as much as digits as its factorization.

1312032109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 1312032109 is about 36221.9837805717. The cubic root of 1312032109 is about 1094.7496655348.

The spelling of 1312032109 in words is "one billion, three hundred twelve million, thirty-two thousand, one hundred nine".