1387945011 has 4 divisors (see below), whose sum is σ = 1850593352. Its totient is φ = 925296672.

The previous prime is 1387945001. The next prime is 1387945037. The reversal of 1387945011 is 1105497831.

1387945011 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1387945011 - 2⁵ = 1387944979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1387945001) 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, 231324166 + ... + 231324171.

It is an arithmetic number, because the mean of its divisors is an integer number (462648338).

Almost surely, 2^1387945011 is an apocalyptic number.

1387945011 is a deficient number, since it is larger than the sum of its proper divisors (462648341).

1387945011 is an equidigital number, since it uses as much as digits as its factorization.

1387945011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 462648340.

The product of its (nonzero) digits is 30240, while the sum is 39.

The square root of 1387945011 is about 37255.1340220378. The cubic root of 1387945011 is about 1115.4687810102.

The spelling of 1387945011 in words is "one billion, three hundred eighty-seven million, nine hundred forty-five thousand, eleven".