446620981 has 4 divisors (see below), whose sum is σ = 447423372. Its totient is φ = 445818592.

The previous prime is 446620961. The next prime is 446620987. The reversal of 446620981 is 189026644.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69872881 + 376748100 = 8359^2 + 19410^2 .

It is a cyclic number.

It is not a de Polignac number, because 446620981 - 2¹⁵ = 446588213 is a prime.

It is a super-2 number, since 2×446620981² = 398940601338804722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (446620987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 400360 + ... + 401473.

It is an arithmetic number, because the mean of its divisors is an integer number (111855843).

Almost surely, 2^446620981 is an apocalyptic number.

It is an amenable number.

446620981 is a deficient number, since it is larger than the sum of its proper divisors (802391).

446620981 is an equidigital number, since it uses as much as digits as its factorization.

446620981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802390.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 446620981 is about 21133.4091192122. The cubic root of 446620981 is about 764.3865565054.

The spelling of 446620981 in words is "four hundred forty-six million, six hundred twenty thousand, nine hundred eighty-one".