73947689 has 2 divisors, whose sum is σ = 73947690. Its totient is φ = 73947688.

The previous prime is 73947649. The next prime is 73947703. The reversal of 73947689 is 98674937.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61465600 + 12482089 = 7840^2 + 3533^2 .

It is an emirp because it is prime and its reverse (98674937) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73947689 - 2¹² = 73943593 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 73947689.

It is not a weakly prime, because it can be changed into another prime (73947619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36973844 + 36973845.

It is an arithmetic number, because the mean of its divisors is an integer number (36973845).

Almost surely, 2^73947689 is an apocalyptic number.

It is an amenable number.

73947689 is a deficient number, since it is larger than the sum of its proper divisors (1).

73947689 is an equidigital number, since it uses as much as digits as its factorization.

73947689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 53.

The square root of 73947689 is about 8599.2842143983. The cubic root of 73947689 is about 419.7346945031.

The spelling of 73947689 in words is "seventy-three million, nine hundred forty-seven thousand, six hundred eighty-nine".