84807621 has 16 divisors (see below), whose sum is σ = 132254400. Its totient is φ = 53562384.

The previous prime is 84807617. The next prime is 84807637. The reversal of 84807621 is 12670848.

It is not a de Polignac number, because 84807621 - 2² = 84807617 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84807691) 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 15 ways as a sum of consecutive naturals, for example, 82146 + ... + 83171.

It is an arithmetic number, because the mean of its divisors is an integer number (8265900).

Almost surely, 2^84807621 is an apocalyptic number.

It is an amenable number.

84807621 is a deficient number, since it is larger than the sum of its proper divisors (47446779).

84807621 is a wasteful number, since it uses less digits than its factorization.

84807621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165345 (or 165339 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 84807621 is about 9209.1053311383. The cubic root of 84807621 is about 439.3510077502.

The spelling of 84807621 in words is "eighty-four million, eight hundred seven thousand, six hundred twenty-one".