1312404311 has 4 divisors (see below), whose sum is σ = 1369465392. Its totient is φ = 1255343232.

The previous prime is 1312404299. The next prime is 1312404323. The reversal of 1312404311 is 1134042131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1134042131 = 2293 ⋅494567.

It is an interprime number because it is at equal distance from previous prime (1312404299) and next prime (1312404323).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312404311 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 (1312404341) 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, 28530506 + ... + 28530551.

It is an arithmetic number, because the mean of its divisors is an integer number (342366348).

Almost surely, 2^1312404311 is an apocalyptic number.

1312404311 is a deficient number, since it is larger than the sum of its proper divisors (57061081).

1312404311 is an equidigital number, since it uses as much as digits as its factorization.

1312404311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57061080.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1312404311 is about 36227.1212077361. The cubic root of 1312404311 is about 1094.8531765915.

Adding to 1312404311 its reverse (1134042131), we get a palindrome (2446446442).

The spelling of 1312404311 in words is "one billion, three hundred twelve million, four hundred four thousand, three hundred eleven".