1313061984 has 72 divisors (see below), whose sum is σ = 4021263792. Its totient is φ = 404017920.

The previous prime is 1313061979. The next prime is 1313061989. The reversal of 1313061984 is 4891603131.

1313061984 is a `hidden beast` number, since 1 + 3 + 1 + 30 + 619 + 8 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (1313061979) and next prime (1313061989).

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313061989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 171612 + ... + 179099.

It is an arithmetic number, because the mean of its divisors is an integer number (55850886).

Almost surely, 2^1313061984 is an apocalyptic number.

It is an amenable number.

1313061984 is an abundant number, since it is smaller than the sum of its proper divisors (2708201808).

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

1313061984 is a wasteful number, since it uses less digits than its factorization.

1313061984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350740 (or 350729 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1313061984 is about 36236.1971514672. The cubic root of 1313061984 is about 1095.0360305902.

The spelling of 1313061984 in words is "one billion, three hundred thirteen million, sixty-one thousand, nine hundred eighty-four".