101689543 has 2 divisors, whose sum is σ = 101689544. Its totient is φ = 101689542.

The previous prime is 101689519. The next prime is 101689559. The reversal of 101689543 is 345986101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 101689543 - 2⁹ = 101689031 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101689513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50844771 + 50844772.

It is an arithmetic number, because the mean of its divisors is an integer number (50844772).

Almost surely, 2^101689543 is an apocalyptic number.

101689543 is a deficient number, since it is larger than the sum of its proper divisors (1).

101689543 is an equidigital number, since it uses as much as digits as its factorization.

101689543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 101689543 is about 10084.1233134071. The cubic root of 101689543 is about 466.7583527902.

The spelling of 101689543 in words is "one hundred one million, six hundred eighty-nine thousand, five hundred forty-three".