84723621 has 4 divisors (see below), whose sum is σ = 112964832. Its totient is φ = 56482412.

The previous prime is 84723619. The next prime is 84723623. The reversal of 84723621 is 12632748.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (84723619) and next prime (84723623).

It is a cyclic number.

It is not a de Polignac number, because 84723621 - 2¹ = 84723619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84723623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14120601 + ... + 14120606.

It is an arithmetic number, because the mean of its divisors is an integer number (28241208).

Almost surely, 2^84723621 is an apocalyptic number.

It is an amenable number.

84723621 is a deficient number, since it is larger than the sum of its proper divisors (28241211).

84723621 is a wasteful number, since it uses less digits than its factorization.

84723621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28241210.

The product of its digits is 16128, while the sum is 33.

The square root of 84723621 is about 9204.5434976429. The cubic root of 84723621 is about 439.2059041396.

The spelling of 84723621 in words is "eighty-four million, seven hundred twenty-three thousand, six hundred twenty-one".