1138611229 has 4 divisors (see below), whose sum is σ = 1301269984. Its totient is φ = 975952476.

The previous prime is 1138611191. The next prime is 1138611277. The reversal of 1138611229 is 9221168311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1138611229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1138611194 and 1138611203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138611629) 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, 81329367 + ... + 81329380.

It is an arithmetic number, because the mean of its divisors is an integer number (325317496).

Almost surely, 2^1138611229 is an apocalyptic number.

It is an amenable number.

1138611229 is a deficient number, since it is larger than the sum of its proper divisors (162658755).

1138611229 is an equidigital number, since it uses as much as digits as its factorization.

1138611229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162658754.

The product of its digits is 5184, while the sum is 34.

The square root of 1138611229 is about 33743.3138414116. The cubic root of 1138611229 is about 1044.2195523459.

The spelling of 1138611229 in words is "one billion, one hundred thirty-eight million, six hundred eleven thousand, two hundred twenty-nine".