1311323634 has 32 divisors (see below), whose sum is σ = 2928720000. Its totient is φ = 434907792.

The previous prime is 1311323617. The next prime is 1311323669. The reversal of 1311323634 is 4363231131.

1311323634 is a `hidden beast` number, since 1 + 3 + 1 + 1 + 3 + 23 + 634 = 666.

1311323634 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1311323598 and 1311323607.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50269 + ... + 71760.

It is an arithmetic number, because the mean of its divisors is an integer number (91522500).

Almost surely, 2^1311323634 is an apocalyptic number.

1311323634 is an abundant number, since it is smaller than the sum of its proper divisors (1617396366).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311323634 is a wasteful number, since it uses less digits than its factorization.

1311323634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122239 (or 122233 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 1311323634 is about 36212.2028327469. The cubic root of 1311323634 is about 1094.5525813298.

Adding to 1311323634 its reverse (4363231131), we get a palindrome (5674554765).

The spelling of 1311323634 in words is "one billion, three hundred eleven million, three hundred twenty-three thousand, six hundred thirty-four".