838816997 has 4 divisors (see below), whose sum is σ = 882965280. Its totient is φ = 794668716.

The previous prime is 838816949. The next prime is 838816999. The reversal of 838816997 is 799618838.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 838816997 - 2¹⁰ = 838815973 is a prime.

It is a super-2 number, since 2×838816997² = 1407227908912196018, 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 (838816999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22074113 + ... + 22074150.

It is an arithmetic number, because the mean of its divisors is an integer number (220741320).

Almost surely, 2^838816997 is an apocalyptic number.

It is an amenable number.

838816997 is a deficient number, since it is larger than the sum of its proper divisors (44148283).

838816997 is a wasteful number, since it uses less digits than its factorization.

838816997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44148282.

The product of its digits is 5225472, while the sum is 59.

The square root of 838816997 is about 28962.3375610464. The cubic root of 838816997 is about 943.0956477949.

The spelling of 838816997 in words is "eight hundred thirty-eight million, eight hundred sixteen thousand, nine hundred ninety-seven".