4238445997 has 2 divisors, whose sum is σ = 4238445998. Its totient is φ = 4238445996.

The previous prime is 4238445979. The next prime is 4238446007. The reversal of 4238445997 is 7995448324.

Together with previous prime (4238445979) 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., 3971646441 + 266799556 = 63021^2 + 16334^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4238445997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4238445907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2119222998 + 2119222999.

It is an arithmetic number, because the mean of its divisors is an integer number (2119222999).

Almost surely, 2^4238445997 is an apocalyptic number.

It is an amenable number.

4238445997 is a deficient number, since it is larger than the sum of its proper divisors (1).

4238445997 is an equidigital number, since it uses as much as digits as its factorization.

4238445997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 55.

The square root of 4238445997 is about 65103.3485851534. The cubic root of 4238445997 is about 1618.3367063187.

The spelling of 4238445997 in words is "four billion, two hundred thirty-eight million, four hundred forty-five thousand, nine hundred ninety-seven".