1312657607 has 4 divisors (see below), whose sum is σ = 1324274160. Its totient is φ = 1301041056.

The previous prime is 1312657589. The next prime is 1312657613. The reversal of 1312657607 is 7067562131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1312657607 - 2⁶ = 1312657543 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 (1312657627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5808107 + ... + 5808332.

It is an arithmetic number, because the mean of its divisors is an integer number (331068540).

Almost surely, 2^1312657607 is an apocalyptic number.

1312657607 is a deficient number, since it is larger than the sum of its proper divisors (11616553).

1312657607 is a wasteful number, since it uses less digits than its factorization.

1312657607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11616552.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 1312657607 is about 36230.6169834299. The cubic root of 1312657607 is about 1094.9236081622.

The spelling of 1312657607 in words is "one billion, three hundred twelve million, six hundred fifty-seven thousand, six hundred seven".