446221493 has 2 divisors, whose sum is σ = 446221494. Its totient is φ = 446221492.

The previous prime is 446221483. The next prime is 446221499. The reversal of 446221493 is 394122644.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367757329 + 78464164 = 19177^2 + 8858^2 .

It is a cyclic number.

It is not a de Polignac number, because 446221493 - 2⁶ = 446221429 is a prime.

It is a super-2 number, since 2×446221493² = 398227241630298098, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (446221499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223110746 + 223110747.

It is an arithmetic number, because the mean of its divisors is an integer number (223110747).

Almost surely, 2^446221493 is an apocalyptic number.

It is an amenable number.

446221493 is a deficient number, since it is larger than the sum of its proper divisors (1).

446221493 is an equidigital number, since it uses as much as digits as its factorization.

446221493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 35.

The square root of 446221493 is about 21123.9554297958. The cubic root of 446221493 is about 764.1585821821.

The spelling of 446221493 in words is "four hundred forty-six million, two hundred twenty-one thousand, four hundred ninety-three".