443135997 has 6 divisors (see below), whose sum is σ = 640085342. Its totient is φ = 295423992.

The previous prime is 443135989. The next prime is 443136017. The reversal of 443135997 is 799531344.

443135997 is a `hidden beast` number, since 4 + 43 + 13 + 599 + 7 = 666.

It can be written as a sum of positive squares in only one way, i.e., 397045476 + 46090521 = 19926^2 + 6789^2 .

It is not a de Polignac number, because 443135997 - 2³ = 443135989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (443135977) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24618658 + ... + 24618675.

Almost surely, 2^443135997 is an apocalyptic number.

It is an amenable number.

443135997 is a deficient number, since it is larger than the sum of its proper divisors (196949345).

443135997 is a wasteful number, since it uses less digits than its factorization.

443135997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49237339 (or 49237336 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The square root of 443135997 is about 21050.7956381701. The cubic root of 443135997 is about 762.3931930304.

The spelling of 443135997 in words is "four hundred forty-three million, one hundred thirty-five thousand, nine hundred ninety-seven".