823293425421 has 6 divisors (see below), whose sum is σ = 1189201614510. Its totient is φ = 548862283608.

The previous prime is 823293425393. The next prime is 823293425431. The reversal of 823293425421 is 124524392328.

823293425421 is a `hidden beast` number, since 8 + 232 + 9 + 342 + 54 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 811826228196 + 11467197225 = 901014^2 + 107085^2 .

It is not a de Polignac number, because 823293425421 - 2⁹ = 823293424909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (823293425431) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 45738523626 + ... + 45738523643.

It is an arithmetic number, because the mean of its divisors is an integer number (198200269085).

Almost surely, 2^823293425421 is an apocalyptic number.

It is an amenable number.

823293425421 is a deficient number, since it is larger than the sum of its proper divisors (365908189089).

823293425421 is a wasteful number, since it uses less digits than its factorization.

823293425421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91477047275 (or 91477047272 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The spelling of 823293425421 in words is "eight hundred twenty-three billion, two hundred ninety-three million, four hundred twenty-five thousand, four hundred twenty-one".