98691 has 8 divisors (see below), whose sum is σ = 133824. Its totient is φ = 64680.

The previous prime is 98689. The next prime is 98711. The reversal of 98691 is 19689.

It is a happy number.

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

It is not a de Polignac number, because 98691 - 2¹ = 98689 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (98621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45 + ... + 446.

It is an arithmetic number, because the mean of its divisors is an integer number (16728).

2⁹⁸⁶⁹¹ is an apocalyptic number.

98691 is a deficient number, since it is larger than the sum of its proper divisors (35133).

98691 is a wasteful number, since it uses less digits than its factorization.

98691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561.

The product of its digits is 3888, while the sum is 33.

The square root of 98691 is about 314.1512374637. The cubic root of 98691 is about 46.2124701631.

It can be divided in two parts, 9869 and 1, that added together give a triangular number (9870 = T₁₄₀).

The spelling of 98691 in words is "ninety-eight thousand, six hundred ninety-one".