1138435109 has 8 divisors (see below), whose sum is σ = 1317538560. Its totient is φ = 963449136.

The previous prime is 1138435099. The next prime is 1138435127. The reversal of 1138435109 is 9015348311.

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 1138435109 - 2⁸ = 1138434853 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 (1138435189) 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, 1028774 + ... + 1029879.

It is an arithmetic number, because the mean of its divisors is an integer number (164692320).

Almost surely, 2^1138435109 is an apocalyptic number.

It is an amenable number.

1138435109 is a deficient number, since it is larger than the sum of its proper divisors (179103451).

1138435109 is an equidigital number, since it uses as much as digits as its factorization.

1138435109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2058739.

The product of its (nonzero) digits is 12960, while the sum is 35.

The square root of 1138435109 is about 33740.7040382977. The cubic root of 1138435109 is about 1044.1657097272.

The spelling of 1138435109 in words is "one billion, one hundred thirty-eight million, four hundred thirty-five thousand, one hundred nine".