1388487273 has 4 divisors (see below), whose sum is σ = 1851316368. Its totient is φ = 925658180.

The previous prime is 1388487251. The next prime is 1388487281. The reversal of 1388487273 is 3727848831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1388487273 - 2¹⁶ = 1388421737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388487203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231414543 + ... + 231414548.

It is an arithmetic number, because the mean of its divisors is an integer number (462829092).

Almost surely, 2^1388487273 is an apocalyptic number.

It is an amenable number.

1388487273 is a deficient number, since it is larger than the sum of its proper divisors (462829095).

1388487273 is an equidigital number, since it uses as much as digits as its factorization.

1388487273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462829094.

The product of its digits is 1806336, while the sum is 51.

The square root of 1388487273 is about 37262.4109928491. The cubic root of 1388487273 is about 1115.6140311392.

The spelling of 1388487273 in words is "one billion, three hundred eighty-eight million, four hundred eighty-seven thousand, two hundred seventy-three".