1387390113 has 10 divisors (see below), whose sum is σ = 2072521154. Its totient is φ = 924926688.

The previous prime is 1387390099. The next prime is 1387390129. The reversal of 1387390113 is 3110937831.

It can be written as a sum of positive squares in only one way, i.e., 901981089 + 485409024 = 30033^2 + 22032^2 .

It is not a de Polignac number, because 1387390113 - 2⁶ = 1387390049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1387390163) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8564056 + ... + 8564217.

Almost surely, 2^1387390113 is an apocalyptic number.

It is an amenable number.

1387390113 is a deficient number, since it is larger than the sum of its proper divisors (685131041).

1387390113 is an equidigital number, since it uses as much as digits as its factorization.

1387390113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17128285 (or 17128276 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 1387390113 is about 37247.6860086637. The cubic root of 1387390113 is about 1115.3201070361.

The spelling of 1387390113 in words is "one billion, three hundred eighty-seven million, three hundred ninety thousand, one hundred thirteen".