73145912113 has 2 divisors, whose sum is σ = 73145912114. Its totient is φ = 73145912112.

The previous prime is 73145912111. The next prime is 73145912129. The reversal of 73145912113 is 31121954137.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45259584049 + 27886328064 = 212743^2 + 166992^2 .

It is an emirp because it is prime and its reverse (31121954137) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 73145912113 - 2¹ = 73145912111 is a prime.

Together with 73145912111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (73145912111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36572956056 + 36572956057.

It is an arithmetic number, because the mean of its divisors is an integer number (36572956057).

Almost surely, 2^73145912113 is an apocalyptic number.

It is an amenable number.

73145912113 is a deficient number, since it is larger than the sum of its proper divisors (1).

73145912113 is an equidigital number, since it uses as much as digits as its factorization.

73145912113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22680, while the sum is 37.

The spelling of 73145912113 in words is "seventy-three billion, one hundred forty-five million, nine hundred twelve thousand, one hundred thirteen".