84621601 has 3 divisors (see below), whose sum is σ = 84630801. Its totient is φ = 84612402.

The previous prime is 84621583. The next prime is 84621637. The reversal of 84621601 is 10612648.

The square root of 84621601 is 9199.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 84621601 - 2⁵ = 84621569 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

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 84621601.

It is not an unprimeable number, because it can be changed into a prime (84651601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4600 + ... + 13798.

It is an arithmetic number, because the mean of its divisors is an integer number (28210267).

Almost surely, 2^84621601 is an apocalyptic number.

84621601 is the 9199-th square number.

84621601 is the 4600-th centered octagonal number.

It is an amenable number.

84621601 is a deficient number, since it is larger than the sum of its proper divisors (9200).

84621601 is an frugal number, since it uses more digits than its factorization.

84621601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18398 (or 9199 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The cubic root of 84621601 is about 439.0295433130.

Multiplying 84621601 by its product of nonzero digits (2304), we get a square (194968168704 = 441552²).

The spelling of 84621601 in words is "eighty-four million, six hundred twenty-one thousand, six hundred one".