1138902913 has 8 divisors (see below), whose sum is σ = 1208072232. Its totient is φ = 1069975296.

The previous prime is 1138902889. The next prime is 1138902923. The reversal of 1138902913 is 3192098311.

It can be written as a sum of positive squares in 4 ways, for example, as 3415104 + 1135487809 = 1848^2 + 33697^2 .

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 1138902913 - 2¹³ = 1138894721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138902923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50670 + ... + 69607.

It is an arithmetic number, because the mean of its divisors is an integer number (151009029).

Almost surely, 2^1138902913 is an apocalyptic number.

It is an amenable number.

1138902913 is a deficient number, since it is larger than the sum of its proper divisors (69169319).

1138902913 is a wasteful number, since it uses less digits than its factorization.

1138902913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120851.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 1138902913 is about 33747.6356653322. The cubic root of 1138902913 is about 1044.3087124627.

The spelling of 1138902913 in words is "one billion, one hundred thirty-eight million, nine hundred two thousand, nine hundred thirteen".