1439663139 has 20 divisors (see below), whose sum is σ = 2277116424. Its totient is φ = 903317184.

The previous prime is 1439663131. The next prime is 1439663161. The reversal of 1439663139 is 9313669341.

1439663139 is a `hidden beast` number, since 1 + 4 + 3 + 9 + 6 + 631 + 3 + 9 = 666.

It is not a de Polignac number, because 1439663139 - 2³ = 1439663131 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1439663094 and 1439663103.

It is not an unprimeable number, because it can be changed into a prime (1439663131) 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, 521377 + ... + 524130.

Almost surely, 2^1439663139 is an apocalyptic number.

1439663139 is a deficient number, since it is larger than the sum of its proper divisors (837453285).

1439663139 is a wasteful number, since it uses less digits than its factorization.

1439663139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045536 (or 1045527 counting only the distinct ones).

The product of its digits is 314928, while the sum is 45.

The square root of 1439663139 is about 37942.8931290169. The cubic root of 1439663139 is about 1129.1551726962.

The spelling of 1439663139 in words is "one billion, four hundred thirty-nine million, six hundred sixty-three thousand, one hundred thirty-nine".