838013893 has 4 divisors (see below), whose sum is σ = 838118988. Its totient is φ = 837908800.

The previous prime is 838013887. The next prime is 838013921. The reversal of 838013893 is 398310838.

It is a happy number.

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 15069924 + 822943969 = 3882^2 + 28687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838013893 is a prime.

It is a super-2 number, since 2×838013893² = 1404534569722030898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838013833) 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, 39508 + ... + 56893.

It is an arithmetic number, because the mean of its divisors is an integer number (209529747).

Almost surely, 2^838013893 is an apocalyptic number.

It is an amenable number.

838013893 is a deficient number, since it is larger than the sum of its proper divisors (105095).

838013893 is an equidigital number, since it uses as much as digits as its factorization.

838013893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105094.

The product of its (nonzero) digits is 124416, while the sum is 43.

The square root of 838013893 is about 28948.4696141264. The cubic root of 838013893 is about 942.7945707076.

The spelling of 838013893 in words is "eight hundred thirty-eight million, thirteen thousand, eight hundred ninety-three".