1387501011 has 48 divisors (see below), whose sum is σ = 2297786400. Its totient is φ = 799704576.

The previous prime is 1387501009. The next prime is 1387501021. The reversal of 1387501011 is 1101057831.

It is not a de Polignac number, because 1387501011 - 2¹ = 1387501009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1387501021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 194341 + ... + 201353.

It is an arithmetic number, because the mean of its divisors is an integer number (47870550).

Almost surely, 2^1387501011 is an apocalyptic number.

1387501011 is a deficient number, since it is larger than the sum of its proper divisors (910285389).

1387501011 is a wasteful number, since it uses less digits than its factorization.

1387501011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7140 (or 7137 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 27.

The square root of 1387501011 is about 37249.1746351513. The cubic root of 1387501011 is about 1115.3498231371.

Adding to 1387501011 its reverse (1101057831), we get a palindrome (2488558842).

The spelling of 1387501011 in words is "one billion, three hundred eighty-seven million, five hundred one thousand, eleven".