1313431234 has 4 divisors (see below), whose sum is σ = 1970146854. Its totient is φ = 656715616.

The previous prime is 1313431211. The next prime is 1313431241. The reversal of 1313431234 is 4321343131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4321343131 = 7 ⋅617334733.

It can be written as a sum of positive squares in only one way, i.e., 1055925025 + 257506209 = 32495^2 + 16047^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1313431199 and 1313431208.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328357807 + ... + 328357810.

Almost surely, 2^1313431234 is an apocalyptic number.

1313431234 is a deficient number, since it is larger than the sum of its proper divisors (656715620).

1313431234 is an equidigital number, since it uses as much as digits as its factorization.

1313431234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656715619.

The product of its digits is 2592, while the sum is 25.

The square root of 1313431234 is about 36241.2918367985. The cubic root of 1313431234 is about 1095.1386670646.

Adding to 1313431234 its reverse (4321343131), we get a palindrome (5634774365).

The spelling of 1313431234 in words is "one billion, three hundred thirteen million, four hundred thirty-one thousand, two hundred thirty-four".