1312322209 has 4 divisors (see below), whose sum is σ = 1431624240. Its totient is φ = 1193020180.

The previous prime is 1312322171. The next prime is 1312322243. The reversal of 1312322209 is 9022232131.

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 1312322209 - 2¹⁵ = 1312289441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312322269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59650999 + ... + 59651020.

It is an arithmetic number, because the mean of its divisors is an integer number (357906060).

Almost surely, 2^1312322209 is an apocalyptic number.

It is an amenable number.

1312322209 is a deficient number, since it is larger than the sum of its proper divisors (119302031).

1312322209 is a wasteful number, since it uses less digits than its factorization.

1312322209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119302030.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1312322209 is about 36225.9880334547. The cubic root of 1312322209 is about 1094.8303453372.

The spelling of 1312322209 in words is "one billion, three hundred twelve million, three hundred twenty-two thousand, two hundred nine".