98521621 has 8 divisors (see below), whose sum is σ = 107690688. Its totient is φ = 89388000.

The previous prime is 98521583. The next prime is 98521637. The reversal of 98521621 is 12612589.

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

It is a cyclic number.

It is not a de Polignac number, because 98521621 - 2²³ = 90133013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98521651) 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, 2865 + ... + 14326.

It is an arithmetic number, because the mean of its divisors is an integer number (13461336).

Almost surely, 2^98521621 is an apocalyptic number.

98521621 is the 5731-st octagonal number.

It is an amenable number.

98521621 is a deficient number, since it is larger than the sum of its proper divisors (9169067).

98521621 is a wasteful number, since it uses less digits than its factorization.

98521621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17723.

The product of its digits is 8640, while the sum is 34.

The square root of 98521621 is about 9925.8058111168. The cubic root of 98521621 is about 461.8601755108.

The spelling of 98521621 in words is "ninety-eight million, five hundred twenty-one thousand, six hundred twenty-one".