1138917009 has 8 divisors (see below), whose sum is σ = 1537778560. Its totient is φ = 749666736.

The previous prime is 1138917007. The next prime is 1138917037. The reversal of 1138917009 is 9007198311.

1138917009 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 1138917009 - 2¹ = 1138917007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138917007) 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, 2402542 + ... + 2403015.

It is an arithmetic number, because the mean of its divisors is an integer number (192222320).

Almost surely, 2^1138917009 is an apocalyptic number.

It is an amenable number.

1138917009 is a deficient number, since it is larger than the sum of its proper divisors (398861551).

1138917009 is an equidigital number, since it uses as much as digits as its factorization.

1138917009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4805639.

The product of its (nonzero) digits is 13608, while the sum is 39.

The square root of 1138917009 is about 33747.8445089460. The cubic root of 1138917009 is about 1044.3130208531.

The spelling of 1138917009 in words is "one billion, one hundred thirty-eight million, nine hundred seventeen thousand, nine".