73873661 has 2 divisors, whose sum is σ = 73873662. Its totient is φ = 73873660.

The previous prime is 73873633. The next prime is 73873669. The reversal of 73873661 is 16637837.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73633561 + 240100 = 8581^2 + 490^2 .

It is an emirp because it is prime and its reverse (16637837) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73873661 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73873669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36936830 + 36936831.

It is an arithmetic number, because the mean of its divisors is an integer number (36936831).

Almost surely, 2^73873661 is an apocalyptic number.

It is an amenable number.

73873661 is a deficient number, since it is larger than the sum of its proper divisors (1).

73873661 is an equidigital number, since it uses as much as digits as its factorization.

73873661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 41.

The square root of 73873661 is about 8594.9788248721. The cubic root of 73873661 is about 419.5945842226.

The spelling of 73873661 in words is "seventy-three million, eight hundred seventy-three thousand, six hundred sixty-one".