1139571959 has 4 divisors (see below), whose sum is σ = 1139691000. Its totient is φ = 1139452920.

The previous prime is 1139571941. The next prime is 1139571973. The reversal of 1139571959 is 9591759311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1139571959 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 (1139571859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43772 + ... + 64769.

It is an arithmetic number, because the mean of its divisors is an integer number (284922750).

Almost surely, 2^1139571959 is an apocalyptic number.

1139571959 is a deficient number, since it is larger than the sum of its proper divisors (119041).

1139571959 is a wasteful number, since it uses less digits than its factorization.

1139571959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119040.

The product of its digits is 382725, while the sum is 50.

The square root of 1139571959 is about 33757.5466969980. The cubic root of 1139571959 is about 1044.5131647149.

The spelling of 1139571959 in words is "one billion, one hundred thirty-nine million, five hundred seventy-one thousand, nine hundred fifty-nine".