43685101 has 2 divisors, whose sum is σ = 43685102. Its totient is φ = 43685100.

The previous prime is 43685099. The next prime is 43685143. The reversal of 43685101 is 10158634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42120100 + 1565001 = 6490^2 + 1251^2 .

It is a cyclic number.

It is not a de Polignac number, because 43685101 - 2¹ = 43685099 is a prime.

Together with 43685099, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 43685101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43685501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21842550 + 21842551.

It is an arithmetic number, because the mean of its divisors is an integer number (21842551).

Almost surely, 2^43685101 is an apocalyptic number.

It is an amenable number.

43685101 is a deficient number, since it is larger than the sum of its proper divisors (1).

43685101 is an equidigital number, since it uses as much as digits as its factorization.

43685101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 43685101 is about 6609.4705536828. The cubic root of 43685101 is about 352.1906169924.

The spelling of 43685101 in words is "forty-three million, six hundred eighty-five thousand, one hundred one".