1312613705 has 12 divisors (see below), whose sum is σ = 1705622220. Its totient is φ = 969314112.

The previous prime is 1312613699. The next prime is 1312613711. The reversal of 1312613705 is 5073162131.

It is an interprime number because it is at equal distance from previous prime (1312613699) and next prime (1312613711).

It can be written as a sum of positive squares in 6 ways, for example, as 17405584 + 1295208121 = 4172^2 + 35989^2 .

It is not a de Polignac number, because 1312613705 - 2¹⁶ = 1312548169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 775850 + ... + 777539.

It is an arithmetic number, because the mean of its divisors is an integer number (142135185).

Almost surely, 2^1312613705 is an apocalyptic number.

It is an amenable number.

1312613705 is a deficient number, since it is larger than the sum of its proper divisors (393008515).

1312613705 is a wasteful number, since it uses less digits than its factorization.

1312613705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553420 (or 1553407 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 1312613705 is about 36230.0111095760. The cubic root of 1312613705 is about 1094.9114014065.

Adding to 1312613705 its reverse (5073162131), we get a palindrome (6385775836).

The spelling of 1312613705 in words is "one billion, three hundred twelve million, six hundred thirteen thousand, seven hundred five".