4443121997 has 2 divisors, whose sum is σ = 4443121998. Its totient is φ = 4443121996.

The previous prime is 4443121979. The next prime is 4443122003. The reversal of 4443121997 is 7991213444.

Together with previous prime (4443121979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4191138121 + 251983876 = 64739^2 + 15874^2 .

It is a cyclic number.

It is not a de Polignac number, because 4443121997 - 2¹⁴ = 4443105613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4443121967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2221560998 + 2221560999.

It is an arithmetic number, because the mean of its divisors is an integer number (2221560999).

Almost surely, 2^4443121997 is an apocalyptic number.

It is an amenable number.

4443121997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4443121997 is an equidigital number, since it uses as much as digits as its factorization.

4443121997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728, while the sum is 44.

The square root of 4443121997 is about 66656.7475729202. The cubic root of 4443121997 is about 1643.9782949175.

The spelling of 4443121997 in words is "four billion, four hundred forty-three million, one hundred twenty-one thousand, nine hundred ninety-seven".