100443971 has 2 divisors, whose sum is σ = 100443972. Its totient is φ = 100443970.

The previous prime is 100443961. The next prime is 100443979. The reversal of 100443971 is 179344001.

It is a strong prime.

It is an emirp because it is prime and its reverse (179344001) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100443971 is a prime.

It is not a weakly prime, because it can be changed into another prime (100443979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50221985 + 50221986.

It is an arithmetic number, because the mean of its divisors is an integer number (50221986).

Almost surely, 2^100443971 is an apocalyptic number.

100443971 is a deficient number, since it is larger than the sum of its proper divisors (1).

100443971 is an equidigital number, since it uses as much as digits as its factorization.

100443971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 100443971 is about 10022.1739657621. The cubic root of 100443971 is about 464.8447795791.

Adding to 100443971 its reverse (179344001), we get a palindrome (279787972).

The spelling of 100443971 in words is "one hundred million, four hundred forty-three thousand, nine hundred seventy-one".