1312634423 has 4 divisors (see below), whose sum is σ = 1321444200. Its totient is φ = 1303824648.

The previous prime is 1312634381. The next prime is 1312634429. The reversal of 1312634423 is 3244362131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312634423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312634429) 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, 4404665 + ... + 4404962.

It is an arithmetic number, because the mean of its divisors is an integer number (330361050).

Almost surely, 2^1312634423 is an apocalyptic number.

1312634423 is a deficient number, since it is larger than the sum of its proper divisors (8809777).

1312634423 is an equidigital number, since it uses as much as digits as its factorization.

1312634423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8809776.

The product of its digits is 10368, while the sum is 29.

The square root of 1312634423 is about 36230.2970316281. The cubic root of 1312634423 is about 1094.9171619881.

Adding to 1312634423 its reverse (3244362131), we get a palindrome (4556996554).

The spelling of 1312634423 in words is "one billion, three hundred twelve million, six hundred thirty-four thousand, four hundred twenty-three".