1312023434 has 4 divisors (see below), whose sum is σ = 1968035154. Its totient is φ = 656011716.

The previous prime is 1312023421. The next prime is 1312023469. The reversal of 1312023434 is 4343202131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4343202131 = 71 ⋅61171861.

It can be written as a sum of positive squares in only one way, i.e., 1302993409 + 9030025 = 36097^2 + 3005^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328005857 + ... + 328005860.

Almost surely, 2^1312023434 is an apocalyptic number.

1312023434 is a deficient number, since it is larger than the sum of its proper divisors (656011720).

1312023434 is an equidigital number, since it uses as much as digits as its factorization.

1312023434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656011719.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 1312023434 is about 36221.8640326530. The cubic root of 1312023434 is about 1094.7472527447.

Adding to 1312023434 its reverse (4343202131), we get a palindrome (5655225565).

The spelling of 1312023434 in words is "one billion, three hundred twelve million, twenty-three thousand, four hundred thirty-four".