3686542447 has 4 divisors (see below), whose sum is σ = 4213191376. Its totient is φ = 3159893520.

The previous prime is 3686542421. The next prime is 3686542451. The reversal of 3686542447 is 7442456863.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7442456863 = 23 ⋅323585081.

It is not a de Polignac number, because 3686542447 - 2¹⁹ = 3686018159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3686542447.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3686542417) 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, 263324454 + ... + 263324467.

It is an arithmetic number, because the mean of its divisors is an integer number (1053297844).

Almost surely, 2^3686542447 is an apocalyptic number.

3686542447 is a deficient number, since it is larger than the sum of its proper divisors (526648929).

3686542447 is an equidigital number, since it uses as much as digits as its factorization.

3686542447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 526648928.

The product of its digits is 3870720, while the sum is 49.

The square root of 3686542447 is about 60716.9041289162. The cubic root of 3686542447 is about 1544.8029125471.

The spelling of 3686542447 in words is "three billion, six hundred eighty-six million, five hundred forty-two thousand, four hundred forty-seven".