98866921 has 4 divisors (see below), whose sum is σ = 98985600. Its totient is φ = 98748244.

The previous prime is 98866913. The next prime is 98866927. The reversal of 98866921 is 12966889.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12966889 = 13 ⋅997453.

It is a cyclic number.

It is not a de Polignac number, because 98866921 - 2³ = 98866913 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (98866927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58081 + ... + 59758.

It is an arithmetic number, because the mean of its divisors is an integer number (24746400).

Almost surely, 2^98866921 is an apocalyptic number.

It is an amenable number.

98866921 is a deficient number, since it is larger than the sum of its proper divisors (118679).

98866921 is a wasteful number, since it uses less digits than its factorization.

98866921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118678.

The product of its digits is 373248, while the sum is 49.

The square root of 98866921 is about 9943.1846508048. The cubic root of 98866921 is about 462.3991244326.

It can be divided in two parts, 9886 and 6921, that added together give a 5-th power (16807 = 7⁵).

The spelling of 98866921 in words is "ninety-eight million, eight hundred sixty-six thousand, nine hundred twenty-one".