1311323598 has 48 divisors (see below), whose sum is σ = 3105460176. Its totient is φ = 397457280.

The previous prime is 1311323593. The next prime is 1311323603. The reversal of 1311323598 is 8953231131.

1311323598 is a `hidden beast` number, since 1 + 31 + 1 + 32 + 3 + 598 = 666.

1311323598 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1311323593) and next prime (1311323603).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311323593) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26143 + ... + 57498.

It is an arithmetic number, because the mean of its divisors is an integer number (64697087).

Almost surely, 2^1311323598 is an apocalyptic number.

1311323598 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1311323598 is an abundant number, since it is smaller than the sum of its proper divisors (1794136578).

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

1311323598 is a wasteful number, since it uses less digits than its factorization.

1311323598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83729 (or 83726 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 1311323598 is about 36212.2023356769. The cubic root of 1311323598 is about 1094.5525713135.

The spelling of 1311323598 in words is "one billion, three hundred eleven million, three hundred twenty-three thousand, five hundred ninety-eight".