1387265713 has 4 divisors (see below), whose sum is σ = 1387879920. Its totient is φ = 1386651508.

The previous prime is 1387265707. The next prime is 1387265729. The reversal of 1387265713 is 3175627831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1387265713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1387265713.

It is not an unprimeable number, because it can be changed into a prime (1387265743) 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, 303703 + ... + 308236.

It is an arithmetic number, because the mean of its divisors is an integer number (346969980).

Almost surely, 2^1387265713 is an apocalyptic number.

It is an amenable number.

1387265713 is a deficient number, since it is larger than the sum of its proper divisors (614207).

1387265713 is an equidigital number, since it uses as much as digits as its factorization.

1387265713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614206.

The product of its digits is 211680, while the sum is 43.

The square root of 1387265713 is about 37246.0160688361. The cubic root of 1387265713 is about 1115.2867710703.

The spelling of 1387265713 in words is "one billion, three hundred eighty-seven million, two hundred sixty-five thousand, seven hundred thirteen".