98858921 has 6 divisors (see below), whose sum is σ = 114999210. Its totient is φ = 84736176.

The previous prime is 98858917. The next prime is 98858951. The reversal of 98858921 is 12985889.

It can be written as a sum of positive squares in only one way, i.e., 71149225 + 27709696 = 8435^2 + 5264^2 .

It is not a de Polignac number, because 98858921 - 2² = 98858917 is a prime.

It is a super-2 number, since 2×98858921² = 19546172522568482, which contains 22 as substring.

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 98858921.

It is not an unprimeable number, because it can be changed into a prime (98858911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1008716 + ... + 1008813.

It is an arithmetic number, because the mean of its divisors is an integer number (19166535).

Almost surely, 2^98858921 is an apocalyptic number.

It is an amenable number.

98858921 is a deficient number, since it is larger than the sum of its proper divisors (16140289).

98858921 is a wasteful number, since it uses less digits than its factorization.

98858921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2017543 (or 2017536 counting only the distinct ones).

The product of its digits is 414720, while the sum is 50.

The square root of 98858921 is about 9942.7823570669. The cubic root of 98858921 is about 462.3866521357.

The spelling of 98858921 in words is "ninety-eight million, eight hundred fifty-eight thousand, nine hundred twenty-one".