1313947136 has 40 divisors (see below), whose sum is σ = 2779777440. Its totient is φ = 618323968.

The previous prime is 1313947127. The next prime is 1313947241. The reversal of 1313947136 is 6317493131.

It is a self number, because there is not a number n which added to its sum of digits gives 1313947136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66776 + ... + 84183.

It is an arithmetic number, because the mean of its divisors is an integer number (69494436).

Almost surely, 2^1313947136 is an apocalyptic number.

1313947136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1313947136 is an abundant number, since it is smaller than the sum of its proper divisors (1465830304).

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

1313947136 is an equidigital number, since it uses as much as digits as its factorization.

1313947136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150994 (or 150978 counting only the distinct ones).

The product of its digits is 40824, while the sum is 38.

The square root of 1313947136 is about 36248.4087374880. The cubic root of 1313947136 is about 1095.2820346190.

The spelling of 1313947136 in words is "one billion, three hundred thirteen million, nine hundred forty-seven thousand, one hundred thirty-six".