117542543 has 2 divisors, whose sum is σ = 117542544. Its totient is φ = 117542542.

The previous prime is 117542507. The next prime is 117542561. The reversal of 117542543 is 345245711.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117542543 - 2⁶ = 117542479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117542143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58771271 + 58771272.

It is an arithmetic number, because the mean of its divisors is an integer number (58771272).

Almost surely, 2^117542543 is an apocalyptic number.

117542543 is a deficient number, since it is larger than the sum of its proper divisors (1).

117542543 is an equidigital number, since it uses as much as digits as its factorization.

117542543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16800, while the sum is 32.

The square root of 117542543 is about 10841.7038790035. The cubic root of 117542543 is about 489.8521600360.

The spelling of 117542543 in words is "one hundred seventeen million, five hundred forty-two thousand, five hundred forty-three".