73438543 has 2 divisors, whose sum is σ = 73438544. Its totient is φ = 73438542.

The previous prime is 73438523. The next prime is 73438559. The reversal of 73438543 is 34583437.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 73438543 - 2⁹ = 73438031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (73438513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36719271 + 36719272.

It is an arithmetic number, because the mean of its divisors is an integer number (36719272).

Almost surely, 2^73438543 is an apocalyptic number.

73438543 is a deficient number, since it is larger than the sum of its proper divisors (1).

73438543 is an equidigital number, since it uses as much as digits as its factorization.

73438543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 120960, while the sum is 37.

The square root of 73438543 is about 8569.6291051597. The cubic root of 73438543 is about 418.7691534122.

The spelling of 73438543 in words is "seventy-three million, four hundred thirty-eight thousand, five hundred forty-three".