73385881 has 2 divisors, whose sum is σ = 73385882. Its totient is φ = 73385880.

The previous prime is 73385869. The next prime is 73385891. The reversal of 73385881 is 18858337.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40208281 + 33177600 = 6341^2 + 5760^2 .

It is an emirp because it is prime and its reverse (18858337) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73385881 is a prime.

It is a super-2 number, since 2×73385881² = 10770975060292322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (73385891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36692940 + 36692941.

It is an arithmetic number, because the mean of its divisors is an integer number (36692941).

Almost surely, 2^73385881 is an apocalyptic number.

It is an amenable number.

73385881 is a deficient number, since it is larger than the sum of its proper divisors (1).

73385881 is an equidigital number, since it uses as much as digits as its factorization.

73385881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 43.

The square root of 73385881 is about 8566.5559590771. Note that the first 3 decimals coincide. The cubic root of 73385881 is about 418.6690311706.

The spelling of 73385881 in words is "seventy-three million, three hundred eighty-five thousand, eight hundred eighty-one".