73112381 has 2 divisors, whose sum is σ = 73112382. Its totient is φ = 73112380.

The previous prime is 73112339. The next prime is 73112383. The reversal of 73112381 is 18321137.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41088100 + 32024281 = 6410^2 + 5659^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73112381 is a prime.

It is a super-2 number, since 2×73112381² = 10690840510978322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 73112383, it forms a pair of twin primes.

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 73112381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73112383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36556190 + 36556191.

It is an arithmetic number, because the mean of its divisors is an integer number (36556191).

Almost surely, 2^73112381 is an apocalyptic number.

It is an amenable number.

73112381 is a deficient number, since it is larger than the sum of its proper divisors (1).

73112381 is an equidigital number, since it uses as much as digits as its factorization.

73112381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 73112381 is about 8550.5778167326. The cubic root of 73112381 is about 418.1482746638.

The spelling of 73112381 in words is "seventy-three million, one hundred twelve thousand, three hundred eighty-one".