838815073 has 4 divisors (see below), whose sum is σ = 839587840. Its totient is φ = 838042308.

The previous prime is 838815011. The next prime is 838815091. The reversal of 838815073 is 370518838.

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, and also an emirpimes, since its reverse is a distinct semiprime: 370518838 = 2 ⋅185259419.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-838815073 is a prime.

It is a super-2 number, since 2×838815073² = 1407221453383990658, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (838815973) 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, 384753 + ... + 386926.

It is an arithmetic number, because the mean of its divisors is an integer number (209896960).

Almost surely, 2^838815073 is an apocalyptic number.

It is an amenable number.

838815073 is a deficient number, since it is larger than the sum of its proper divisors (772767).

838815073 is a wasteful number, since it uses less digits than its factorization.

838815073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772766.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 838815073 is about 28962.3043454764. The cubic root of 838815073 is about 943.0949267329.

The spelling of 838815073 in words is "eight hundred thirty-eight million, eight hundred fifteen thousand, seventy-three".