1312013223 has 6 divisors (see below), whose sum is σ = 1895130224. Its totient is φ = 874675476.

The previous prime is 1312013221. The next prime is 1312013249. The reversal of 1312013223 is 3223102131.

It is not a de Polignac number, because 1312013223 - 2¹ = 1312013221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1312013196 and 1312013205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312013221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72889615 + ... + 72889632.

Almost surely, 2^1312013223 is an apocalyptic number.

1312013223 is a deficient number, since it is larger than the sum of its proper divisors (583117001).

1312013223 is a wasteful number, since it uses less digits than its factorization.

1312013223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145779253 (or 145779250 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1312013223 is about 36221.7230815984. The cubic root of 1312013223 is about 1094.7444127311.

Adding to 1312013223 its reverse (3223102131), we get a palindrome (4535115354).

The spelling of 1312013223 in words is "one billion, three hundred twelve million, thirteen thousand, two hundred twenty-three".