98765821 has 16 divisors (see below), whose sum is σ = 125654400. Its totient is φ = 76957440.

The previous prime is 98765813. The next prime is 98765833. The reversal of 98765821 is 12856789.

It is not a de Polignac number, because 98765821 - 2³ = 98765813 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98765221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9316 + ... + 16861.

It is an arithmetic number, because the mean of its divisors is an integer number (7853400).

Almost surely, 2^98765821 is an apocalyptic number.

It is an amenable number.

98765821 is a deficient number, since it is larger than the sum of its proper divisors (26888579).

98765821 is a wasteful number, since it uses less digits than its factorization.

98765821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26209 (or 26195 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 98765821 is about 9938.0994661957. The cubic root of 98765821 is about 462.2414562767.

The spelling of 98765821 in words is "ninety-eight million, seven hundred sixty-five thousand, eight hundred twenty-one".