1139989447 has 4 divisors (see below), whose sum is σ = 1140562296. Its totient is φ = 1139416600.

The previous prime is 1139989429. The next prime is 1139989453. The reversal of 1139989447 is 7449899311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7449899311 = 307 ⋅24266773.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139989447 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 (1139989427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283429 + ... + 287422.

It is an arithmetic number, because the mean of its divisors is an integer number (285140574).

Almost surely, 2^1139989447 is an apocalyptic number.

1139989447 is a deficient number, since it is larger than the sum of its proper divisors (572849).

1139989447 is an equidigital number, since it uses as much as digits as its factorization.

1139989447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572848.

The product of its digits is 1959552, while the sum is 55.

The square root of 1139989447 is about 33763.7297554639. The cubic root of 1139989447 is about 1044.6407033833.

The spelling of 1139989447 in words is "one billion, one hundred thirty-nine million, nine hundred eighty-nine thousand, four hundred forty-seven".