1139812479 has 20 divisors (see below), whose sum is σ = 1833660136. Its totient is φ = 701422416.

The previous prime is 1139812459. The next prime is 1139812507. The reversal of 1139812479 is 9742189311.

1139812479 is a `hidden beast` number, since 11 + 398 + 1 + 247 + 9 = 666.

It is not a de Polignac number, because 1139812479 - 2¹⁹ = 1139288191 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139812459) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 540169 + ... + 542274.

Almost surely, 2^1139812479 is an apocalyptic number.

1139812479 is a deficient number, since it is larger than the sum of its proper divisors (693847657).

1139812479 is a wasteful number, since it uses less digits than its factorization.

1139812479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082468 (or 1082459 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1139812479 is about 33761.1089717148. The cubic root of 1139812479 is about 1044.5866451218.

The spelling of 1139812479 in words is "one billion, one hundred thirty-nine million, eight hundred twelve thousand, four hundred seventy-nine".