1387146715 has 4 divisors (see below), whose sum is σ = 1664576064. Its totient is φ = 1109717368.

The previous prime is 1387146707. The next prime is 1387146743. The reversal of 1387146715 is 5176417831.

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 1387146715 - 2³ = 1387146707 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138714667 + ... + 138714676.

It is an arithmetic number, because the mean of its divisors is an integer number (416144016).

Almost surely, 2^1387146715 is an apocalyptic number.

1387146715 is a deficient number, since it is larger than the sum of its proper divisors (277429349).

1387146715 is an equidigital number, since it uses as much as digits as its factorization.

1387146715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277429348.

The product of its digits is 141120, while the sum is 43.

The square root of 1387146715 is about 37244.4185751369. The cubic root of 1387146715 is about 1115.2548808349.

The spelling of 1387146715 in words is "one billion, three hundred eighty-seven million, one hundred forty-six thousand, seven hundred fifteen".