1312661653 has 8 divisors (see below), whose sum is σ = 1343181528. Its totient is φ = 1282354944.

The previous prime is 1312661639. The next prime is 1312661671. The reversal of 1312661653 is 3561662131.

It can be written as a sum of positive squares in 4 ways, for example, as 214534609 + 1098127044 = 14647^2 + 33138^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1312661653 - 2⁵ = 1312661621 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 (1312661353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40800 + ... + 65497.

It is an arithmetic number, because the mean of its divisors is an integer number (167897691).

Almost surely, 2^1312661653 is an apocalyptic number.

It is an amenable number.

1312661653 is a deficient number, since it is larger than the sum of its proper divisors (30519875).

1312661653 is a wasteful number, since it uses less digits than its factorization.

1312661653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106583.

The product of its digits is 19440, while the sum is 34.

The square root of 1312661653 is about 36230.6728201396. The cubic root of 1312661653 is about 1094.9247331208.

The spelling of 1312661653 in words is "one billion, three hundred twelve million, six hundred sixty-one thousand, six hundred fifty-three".