851323093 has 4 divisors (see below), whose sum is σ = 901400940. Its totient is φ = 801245248.

The previous prime is 851323021. The next prime is 851323133. The reversal of 851323093 is 390323158.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 390323158 = 2 ⋅195161579.

It can be written as a sum of positive squares in 2 ways, for example, as 571831569 + 279491524 = 23913^2 + 16718^2 .

It is a cyclic number.

It is not a de Polignac number, because 851323093 - 2²⁵ = 817768661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851323493) 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, 25038898 + ... + 25038931.

It is an arithmetic number, because the mean of its divisors is an integer number (225350235).

Almost surely, 2^851323093 is an apocalyptic number.

It is an amenable number.

851323093 is a deficient number, since it is larger than the sum of its proper divisors (50077847).

851323093 is a wasteful number, since it uses less digits than its factorization.

851323093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50077846.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 851323093 is about 29177.4415088095. The cubic root of 851323093 is about 947.7594819843.

The spelling of 851323093 in words is "eight hundred fifty-one million, three hundred twenty-three thousand, ninety-three".