73998689 has 2 divisors, whose sum is σ = 73998690. Its totient is φ = 73998688.

The previous prime is 73998679. The next prime is 73998731. The reversal of 73998689 is 98689937.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72931600 + 1067089 = 8540^2 + 1033^2 .

It is a cyclic number.

It is not a de Polignac number, because 73998689 - 2¹² = 73994593 is a prime.

It is not a weakly prime, because it can be changed into another prime (73998649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36999344 + 36999345.

It is an arithmetic number, because the mean of its divisors is an integer number (36999345).

Almost surely, 2^73998689 is an apocalyptic number.

It is an amenable number.

73998689 is a deficient number, since it is larger than the sum of its proper divisors (1).

73998689 is an equidigital number, since it uses as much as digits as its factorization.

73998689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5878656, while the sum is 59.

The square root of 73998689 is about 8602.2490663779. The cubic root of 73998689 is about 419.8311660783.

The spelling of 73998689 in words is "seventy-three million, nine hundred ninety-eight thousand, six hundred eighty-nine".