98086821 has 32 divisors (see below), whose sum is σ = 163381248. Its totient is φ = 51045120.

The previous prime is 98086817. The next prime is 98086829. The reversal of 98086821 is 12868089.

It is not a de Polignac number, because 98086821 - 2² = 98086817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98086829) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6636 + ... + 15498.

It is an arithmetic number, because the mean of its divisors is an integer number (5105664).

Almost surely, 2^98086821 is an apocalyptic number.

It is an amenable number.

98086821 is a deficient number, since it is larger than the sum of its proper divisors (65294427).

98086821 is a wasteful number, since it uses less digits than its factorization.

98086821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8921.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 98086821 is about 9903.8790885188. The cubic root of 98086821 is about 461.1797395937.

The spelling of 98086821 in words is "ninety-eight million, eighty-six thousand, eight hundred twenty-one".