1312102009 has 8 divisors (see below), whose sum is σ = 1346822280. Its totient is φ = 1277808000.

The previous prime is 1312101983. The next prime is 1312102027. The reversal of 1312102009 is 9002012131.

It can be written as a sum of positive squares in 4 ways, for example, as 539539984 + 772562025 = 23228^2 + 27795^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312102009 - 2⁵ = 1312101977 is a prime.

It is a super-2 number, since 2×1312102009² = 3443223364043672162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312102409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100324 + ... + 112645.

It is an arithmetic number, because the mean of its divisors is an integer number (168352785).

Almost surely, 2^1312102009 is an apocalyptic number.

It is an amenable number.

1312102009 is a deficient number, since it is larger than the sum of its proper divisors (34720271).

1312102009 is a wasteful number, since it uses less digits than its factorization.

1312102009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213131.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 1312102009 is about 36222.9486513729. The cubic root of 1312102009 is about 1094.7691065332.

The spelling of 1312102009 in words is "one billion, three hundred twelve million, one hundred two thousand, nine".