105691543 has 2 divisors, whose sum is σ = 105691544. Its totient is φ = 105691542.

The previous prime is 105691513. The next prime is 105691571. The reversal of 105691543 is 345196501.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 105691543 - 2²⁵ = 72137111 is a prime.

It is a super-2 number, since 2×105691543² = 22341404523441698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 105691499 and 105691508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (105691513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52845771 + 52845772.

It is an arithmetic number, because the mean of its divisors is an integer number (52845772).

Almost surely, 2^105691543 is an apocalyptic number.

105691543 is a deficient number, since it is larger than the sum of its proper divisors (1).

105691543 is an equidigital number, since it uses as much as digits as its factorization.

105691543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 105691543 is about 10280.6392310984. The cubic root of 105691543 is about 472.8028430973.

The spelling of 105691543 in words is "one hundred five million, six hundred ninety-one thousand, five hundred forty-three".