84453621 has 8 divisors (see below), whose sum is σ = 128691264. Its totient is φ = 48259200.

The previous prime is 84453617. The next prime is 84453643. The reversal of 84453621 is 12635448.

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

It is not a de Polignac number, because 84453621 - 2² = 84453617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84453521) 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, 2010780 + ... + 2010821.

It is an arithmetic number, because the mean of its divisors is an integer number (16086408).

Almost surely, 2^84453621 is an apocalyptic number.

It is an amenable number.

84453621 is a deficient number, since it is larger than the sum of its proper divisors (44237643).

84453621 is a wasteful number, since it uses less digits than its factorization.

84453621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021611.

The product of its digits is 23040, while the sum is 33.

The square root of 84453621 is about 9189.8651241463. The cubic root of 84453621 is about 438.7388490766.

The spelling of 84453621 in words is "eighty-four million, four hundred fifty-three thousand, six hundred twenty-one".