101685643 has 4 divisors (see below), whose sum is σ = 101776840. Its totient is φ = 101594448.

The previous prime is 101685601. The next prime is 101685671. The reversal of 101685643 is 346586101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 346586101 = 109 ⋅3179689.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101685643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101685599 and 101685608.

It is not an unprimeable number, because it can be changed into a prime (101685443) 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, 43905 + ... + 46162.

It is an arithmetic number, because the mean of its divisors is an integer number (25444210).

Almost surely, 2^101685643 is an apocalyptic number.

101685643 is a deficient number, since it is larger than the sum of its proper divisors (91197).

101685643 is an equidigital number, since it uses as much as digits as its factorization.

101685643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91196.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 101685643 is about 10083.9299382731. The cubic root of 101685643 is about 466.7523856711.

The spelling of 101685643 in words is "one hundred one million, six hundred eighty-five thousand, six hundred forty-three".