466191821 has 2 divisors, whose sum is σ = 466191822. Its totient is φ = 466191820.

The previous prime is 466191793. The next prime is 466191839. The reversal of 466191821 is 128191664.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 457489321 + 8702500 = 21389^2 + 2950^2 .

It is a cyclic number.

It is not a de Polignac number, because 466191821 - 2¹⁰ = 466190797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (466191841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 233095910 + 233095911.

It is an arithmetic number, because the mean of its divisors is an integer number (233095911).

Almost surely, 2^466191821 is an apocalyptic number.

It is an amenable number.

466191821 is a deficient number, since it is larger than the sum of its proper divisors (1).

466191821 is an equidigital number, since it uses as much as digits as its factorization.

466191821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 38.

The square root of 466191821 is about 21591.4756559157. The cubic root of 466191821 is about 775.3924178474.

The spelling of 466191821 in words is "four hundred sixty-six million, one hundred ninety-one thousand, eight hundred twenty-one".