512821093 has 2 divisors, whose sum is σ = 512821094. Its totient is φ = 512821092.

The previous prime is 512821091. The next prime is 512821109. The reversal of 512821093 is 390128215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482549089 + 30272004 = 21967^2 + 5502^2 .

It is a cyclic number.

It is not a de Polignac number, because 512821093 - 2¹ = 512821091 is a prime.

Together with 512821091, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512821091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256410546 + 256410547.

It is an arithmetic number, because the mean of its divisors is an integer number (256410547).

Almost surely, 2^512821093 is an apocalyptic number.

It is an amenable number.

512821093 is a deficient number, since it is larger than the sum of its proper divisors (1).

512821093 is an equidigital number, since it uses as much as digits as its factorization.

512821093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 512821093 is about 22645.5534929045. The cubic root of 512821093 is about 800.4274241992.

The spelling of 512821093 in words is "five hundred twelve million, eight hundred twenty-one thousand, ninety-three".