819339093 has 12 divisors (see below), whose sum is σ = 1185466828. Its totient is φ = 545313600.

The previous prime is 819339091. The next prime is 819339127. The reversal of 819339093 is 390933918.

It can be written as a sum of positive squares in 2 ways, for example, as 356529924 + 462809169 = 18882^2 + 21513^2 .

It is not a de Polignac number, because 819339093 - 2¹ = 819339091 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819339091) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70330 + ... + 81147.

Almost surely, 2^819339093 is an apocalyptic number.

It is an amenable number.

819339093 is a deficient number, since it is larger than the sum of its proper divisors (366127735).

819339093 is a wasteful number, since it uses less digits than its factorization.

819339093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152084 (or 152081 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 819339093 is about 28624.0998635765. The cubic root of 819339093 is about 935.7386303144.

The spelling of 819339093 in words is "eight hundred nineteen million, three hundred thirty-nine thousand, ninety-three".