1312901409 has 4 divisors (see below), whose sum is σ = 1750535216. Its totient is φ = 875267604.

The previous prime is 1312901371. The next prime is 1312901437. The reversal of 1312901409 is 9041092131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1312901409 - 2¹⁷ = 1312770337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1312901309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218816899 + ... + 218816904.

It is an arithmetic number, because the mean of its divisors is an integer number (437633804).

Almost surely, 2^1312901409 is an apocalyptic number.

It is an amenable number.

1312901409 is a deficient number, since it is larger than the sum of its proper divisors (437633807).

1312901409 is an equidigital number, since it uses as much as digits as its factorization.

1312901409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437633806.

The product of its (nonzero) digits is 1944, while the sum is 30.

The square root of 1312901409 is about 36233.9814124807. The cubic root of 1312901409 is about 1094.9913912711.

The spelling of 1312901409 in words is "one billion, three hundred twelve million, nine hundred one thousand, four hundred nine".