1131139529 has 8 divisors (see below), whose sum is σ = 1247861832. Its totient is φ = 1018661760.

The previous prime is 1131139487. The next prime is 1131139573. The reversal of 1131139529 is 9259311311.

It can be written as a sum of positive squares in 4 ways, for example, as 30691600 + 1100447929 = 5540^2 + 33173^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1131139529 - 2²⁰ = 1130090953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131139579) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1060574 + ... + 1061639.

It is an arithmetic number, because the mean of its divisors is an integer number (155982729).

Almost surely, 2^1131139529 is an apocalyptic number.

It is an amenable number.

1131139529 is a deficient number, since it is larger than the sum of its proper divisors (116722303).

1131139529 is a wasteful number, since it uses less digits than its factorization.

1131139529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2122267.

The product of its digits is 7290, while the sum is 35.

The square root of 1131139529 is about 33632.4178286367. The cubic root of 1131139529 is about 1041.9304409538.

The spelling of 1131139529 in words is "one billion, one hundred thirty-one million, one hundred thirty-nine thousand, five hundred twenty-nine".