84027621 has 8 divisors (see below), whose sum is σ = 112656544. Its totient is φ = 55708560.

The previous prime is 84027607. The next prime is 84027637. The reversal of 84027621 is 12672048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 84027621 - 2⁵ = 84027589 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84020621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76831 + ... + 77916.

It is an arithmetic number, because the mean of its divisors is an integer number (14082068).

Almost surely, 2^84027621 is an apocalyptic number.

It is an amenable number.

84027621 is a deficient number, since it is larger than the sum of its proper divisors (28628923).

84027621 is a wasteful number, since it uses less digits than its factorization.

84027621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154931.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 84027621 is about 9166.6581151475. The cubic root of 84027621 is about 437.9999113863. Note that the first 4 decimals are identical.

Adding to 84027621 its reverse (12672048), we get a palindrome (96699669).

It can be divided in two parts, 84027 and 621, that added together give a palindrome (84648).

The spelling of 84027621 in words is "eighty-four million, twenty-seven thousand, six hundred twenty-one".