74243231897 has 2 divisors, whose sum is σ = 74243231898. Its totient is φ = 74243231896.

The previous prime is 74243231819. The next prime is 74243231911. The reversal of 74243231897 is 79813234247.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56046301081 + 18196930816 = 236741^2 + 134896^2 .

It is an emirp because it is prime and its reverse (79813234247) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74243231897 - 2²⁰ = 74242183321 is a prime.

It is not a weakly prime, because it can be changed into another prime (74243231297) 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, 37121615948 + 37121615949.

It is an arithmetic number, because the mean of its divisors is an integer number (37121615949).

Almost surely, 2^74243231897 is an apocalyptic number.

It is an amenable number.

74243231897 is a deficient number, since it is larger than the sum of its proper divisors (1).

74243231897 is an equidigital number, since it uses as much as digits as its factorization.

74243231897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2032128, while the sum is 50.

The spelling of 74243231897 in words is "seventy-four billion, two hundred forty-three million, two hundred thirty-one thousand, eight hundred ninety-seven".