443979997 has 2 divisors, whose sum is σ = 443979998. Its totient is φ = 443979996.

The previous prime is 443979959. The next prime is 443980003. The reversal of 443979997 is 799979344.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 443144601 + 835396 = 21051^2 + 914^2 .

It is a cyclic number.

It is not a de Polignac number, because 443979997 - 2²⁷ = 309762269 is a prime.

It is a super-2 number, since 2×443979997² = 394236475472240018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (443979947) 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 as a sum of consecutive naturals, namely, 221989998 + 221989999.

It is an arithmetic number, because the mean of its divisors is an integer number (221989999).

Almost surely, 2^443979997 is an apocalyptic number.

It is an amenable number.

443979997 is a deficient number, since it is larger than the sum of its proper divisors (1).

443979997 is an equidigital number, since it uses as much as digits as its factorization.

443979997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15431472, while the sum is 61.

The square root of 443979997 is about 21070.8328501747. The cubic root of 443979997 is about 762.8769059148.

The spelling of 443979997 in words is "four hundred forty-three million, nine hundred seventy-nine thousand, nine hundred ninety-seven".