1129637231 has 4 divisors (see below), whose sum is σ = 1135314000. Its totient is φ = 1123960464.

The previous prime is 1129637209. The next prime is 1129637237. The reversal of 1129637231 is 1327369211.

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

It is a cyclic number.

It is not a de Polignac number, because 1129637231 - 2²⁶ = 1062528367 is a prime.

It is a super-2 number, since 2×1129637231² = 2552160547322694722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1129637191 and 1129637200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129637237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2838086 + ... + 2838483.

It is an arithmetic number, because the mean of its divisors is an integer number (283828500).

Almost surely, 2^1129637231 is an apocalyptic number.

1129637231 is a deficient number, since it is larger than the sum of its proper divisors (5676769).

1129637231 is an equidigital number, since it uses as much as digits as its factorization.

1129637231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5676768.

The product of its digits is 13608, while the sum is 35.

The square root of 1129637231 is about 33610.0763313623. The cubic root of 1129637231 is about 1041.4689642872.

The spelling of 1129637231 in words is "one billion, one hundred twenty-nine million, six hundred thirty-seven thousand, two hundred thirty-one".