838149313 has 4 divisors (see below), whose sum is σ = 839332180. Its totient is φ = 836966448.

The previous prime is 838149293. The next prime is 838149331. The reversal of 838149313 is 313941838.

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

It can be written as a sum of positive squares in 2 ways, for example, as 189530289 + 648619024 = 13767^2 + 25468^2 .

It is a cyclic number.

It is not a de Polignac number, because 838149313 - 2¹³ = 838141121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838149343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590370 + ... + 591787.

It is an arithmetic number, because the mean of its divisors is an integer number (209833045).

Almost surely, 2^838149313 is an apocalyptic number.

It is an amenable number.

838149313 is a deficient number, since it is larger than the sum of its proper divisors (1182867).

838149313 is a wasteful number, since it uses less digits than its factorization.

838149313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182866.

The product of its digits is 62208, while the sum is 40.

The square root of 838149313 is about 28950.8085033907. The cubic root of 838149313 is about 942.8453520313.

The spelling of 838149313 in words is "eight hundred thirty-eight million, one hundred forty-nine thousand, three hundred thirteen".