1312102309 has 4 divisors (see below), whose sum is σ = 1499545504. Its totient is φ = 1124659116.

The previous prime is 1312102307. The next prime is 1312102403. The reversal of 1312102309 is 9032012131.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9032012131 = 1451 ⋅6224681.

It is not a de Polignac number, because 1312102309 - 2¹ = 1312102307 is a prime.

It is a super-2 number, since 2×1312102309² = 3443224938566262962, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312102309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312102307) 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, 93721587 + ... + 93721600.

It is an arithmetic number, because the mean of its divisors is an integer number (374886376).

Almost surely, 2^1312102309 is an apocalyptic number.

It is an amenable number.

1312102309 is a deficient number, since it is larger than the sum of its proper divisors (187443195).

1312102309 is an equidigital number, since it uses as much as digits as its factorization.

1312102309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187443194.

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

The square root of 1312102309 is about 36222.9527923939. The cubic root of 1312102309 is about 1094.7691899695.

The spelling of 1312102309 in words is "one billion, three hundred twelve million, one hundred two thousand, three hundred nine".