73998344789 has 2 divisors, whose sum is σ = 73998344790. Its totient is φ = 73998344788.

The previous prime is 73998344677. The next prime is 73998344897. The reversal of 73998344789 is 98744389937.

Together with next prime (73998344897) 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., 53804513764 + 20193831025 = 231958^2 + 142105^2 .

It is an emirp because it is prime and its reverse (98744389937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73998344789 - 2⁸ = 73998344533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73998341789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36999172394 + 36999172395.

It is an arithmetic number, because the mean of its divisors is an integer number (36999172395).

Almost surely, 2^73998344789 is an apocalyptic number.

It is an amenable number.

73998344789 is a deficient number, since it is larger than the sum of its proper divisors (1).

73998344789 is an equidigital number, since it uses as much as digits as its factorization.

73998344789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 329204736, while the sum is 71.

The spelling of 73998344789 in words is "seventy-three billion, nine hundred ninety-eight million, three hundred forty-four thousand, seven hundred eighty-nine".