1312423444 has 6 divisors (see below), whose sum is σ = 2296741034. Its totient is φ = 656211720.

The previous prime is 1312423417. The next prime is 1312423481. The reversal of 1312423444 is 4443242131.

It can be written as a sum of positive squares in only one way, i.e., 1118099844 + 194323600 = 33438^2 + 13940^2 .

It is a super-2 number, since 2×1312423444² = 3444910592721642272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164052927 + ... + 164052934.

Almost surely, 2^1312423444 is an apocalyptic number.

It is an amenable number.

1312423444 is a deficient number, since it is larger than the sum of its proper divisors (984317590).

1312423444 is a wasteful number, since it uses less digits than its factorization.

1312423444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328105865 (or 328105863 counting only the distinct ones).

The product of its digits is 9216, while the sum is 28.

The square root of 1312423444 is about 36227.3852768869. The cubic root of 1312423444 is about 1094.8584970363.

Adding to 1312423444 its reverse (4443242131), we get a palindrome (5755665575).

The spelling of 1312423444 in words is "one billion, three hundred twelve million, four hundred twenty-three thousand, four hundred forty-four".