1387516379 has 4 divisors (see below), whose sum is σ = 1387712040. Its totient is φ = 1387320720.

The previous prime is 1387516369. The next prime is 1387516453. The reversal of 1387516379 is 9736157831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9736157831 = 20759 ⋅469009.

It is a cyclic number.

It is not a de Polignac number, because 1387516379 - 2¹⁶ = 1387450843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387516369) 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, 86777 + ... + 101514.

It is an arithmetic number, because the mean of its divisors is an integer number (346928010).

Almost surely, 2^1387516379 is an apocalyptic number.

1387516379 is a deficient number, since it is larger than the sum of its proper divisors (195661).

1387516379 is an equidigital number, since it uses as much as digits as its factorization.

1387516379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195660.

The product of its digits is 952560, while the sum is 50.

The square root of 1387516379 is about 37249.3809210301. The cubic root of 1387516379 is about 1115.3539410038.

The spelling of 1387516379 in words is "one billion, three hundred eighty-seven million, five hundred sixteen thousand, three hundred seventy-nine".