98645 has 8 divisors (see below), whose sum is σ = 120120. Its totient is φ = 77760.

The previous prime is 98641. The next prime is 98663. The reversal of 98645 is 54689.

It can be written as a sum of positive squares in 4 ways, for example, as 676 + 97969 = 26^2 + 313^2 .

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

It is not a de Polignac number, because 98645 - 2² = 98641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (98641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 455 + ... + 635.

It is an arithmetic number, because the mean of its divisors is an integer number (15015).

2⁹⁸⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

98645 is a deficient number, since it is larger than the sum of its proper divisors (21475).

98645 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (98644) it forms a Ruth-Aaron pair, since the sum of their prime factors is the same (295).

98645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its digits is 8640, while the sum is 32.

The square root of 98645 is about 314.0780157859. The cubic root of 98645 is about 46.2052891504.

Subtracting from 98645 its reverse (54689), we obtain a triangular number (43956 = T₂₉₆).

The spelling of 98645 in words is "ninety-eight thousand, six hundred forty-five".