806405533 has 2 divisors, whose sum is σ = 806405534. Its totient is φ = 806405532.

The previous prime is 806405519. The next prime is 806405549. The reversal of 806405533 is 335504608.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 682149924 + 124255609 = 26118^2 + 11147^2 .

It is a cyclic number.

It is not a de Polignac number, because 806405533 - 2¹³ = 806397341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (806405503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403202766 + 403202767.

It is an arithmetic number, because the mean of its divisors is an integer number (403202767).

Almost surely, 2^806405533 is an apocalyptic number.

It is an amenable number.

806405533 is a deficient number, since it is larger than the sum of its proper divisors (1).

806405533 is an equidigital number, since it uses as much as digits as its factorization.

806405533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 806405533 is about 28397.2803803463. The cubic root of 806405533 is about 930.7888373960.

The spelling of 806405533 in words is "eight hundred six million, four hundred five thousand, five hundred thirty-three".