1131013439 has 4 divisors (see below), whose sum is σ = 1141994256. Its totient is φ = 1120032624.

The previous prime is 1131013409. The next prime is 1131013441. The reversal of 1131013439 is 9343101311.

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-1131013439 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 (1131013409) 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, 5490254 + ... + 5490459.

It is an arithmetic number, because the mean of its divisors is an integer number (285498564).

Almost surely, 2^1131013439 is an apocalyptic number.

1131013439 is a deficient number, since it is larger than the sum of its proper divisors (10980817).

1131013439 is a wasteful number, since it uses less digits than its factorization.

1131013439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10980816.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1131013439 is about 33630.5432456867. The cubic root of 1131013439 is about 1041.8917242769.

The spelling of 1131013439 in words is "one billion, one hundred thirty-one million, thirteen thousand, four hundred thirty-nine".