1139315979 has 16 divisors (see below), whose sum is σ = 1609141248. Its totient is φ = 714556032.

The previous prime is 1139315977. The next prime is 1139316001. The reversal of 1139315979 is 9795139311.

It is a happy number.

It is not a de Polignac number, because 1139315979 - 2¹ = 1139315977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1139315977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 193294 + ... + 199100.

It is an arithmetic number, because the mean of its divisors is an integer number (100571328).

Almost surely, 2^1139315979 is an apocalyptic number.

1139315979 is a deficient number, since it is larger than the sum of its proper divisors (469825269).

1139315979 is a wasteful number, since it uses less digits than its factorization.

1139315979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9674.

The product of its digits is 229635, while the sum is 48.

The square root of 1139315979 is about 33753.7550355512. The cubic root of 1139315979 is about 1044.4349498202.

It can be divided in two parts, 11393 and 15979, that added together give a palindrome (27372).

The spelling of 1139315979 in words is "one billion, one hundred thirty-nine million, three hundred fifteen thousand, nine hundred seventy-nine".