73111643 has 4 divisors (see below), whose sum is σ = 79758168. Its totient is φ = 66465120.

The previous prime is 73111627. The next prime is 73111663. The reversal of 73111643 is 34611137.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34611137 = 11 ⋅3146467.

It is a cyclic number.

It is not a de Polignac number, because 73111643 - 2⁴ = 73111627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (73111663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3323246 + ... + 3323267.

It is an arithmetic number, because the mean of its divisors is an integer number (19939542).

Almost surely, 2^73111643 is an apocalyptic number.

73111643 is a deficient number, since it is larger than the sum of its proper divisors (6646525).

73111643 is a wasteful number, since it uses less digits than its factorization.

73111643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6646524.

The product of its digits is 1512, while the sum is 26.

The square root of 73111643 is about 8550.5346616454. The cubic root of 73111643 is about 418.1468677226.

The spelling of 73111643 in words is "seventy-three million, one hundred eleven thousand, six hundred forty-three".