73681873 has 2 divisors, whose sum is σ = 73681874. Its totient is φ = 73681872.

The previous prime is 73681871. The next prime is 73681897. The reversal of 73681873 is 37818637.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70358544 + 3323329 = 8388^2 + 1823^2 .

It is an emirp because it is prime and its reverse (37818637) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73681873 - 2¹ = 73681871 is a prime.

Together with 73681871, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (73681871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36840936 + 36840937.

It is an arithmetic number, because the mean of its divisors is an integer number (36840937).

Almost surely, 2^73681873 is an apocalyptic number.

It is an amenable number.

73681873 is a deficient number, since it is larger than the sum of its proper divisors (1).

73681873 is an equidigital number, since it uses as much as digits as its factorization.

73681873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 43.

The square root of 73681873 is about 8583.8145949222. The cubic root of 73681873 is about 419.2311576817.

The spelling of 73681873 in words is "seventy-three million, six hundred eighty-one thousand, eight hundred seventy-three".