98989691 has 8 divisors (see below), whose sum is σ = 106290144. Its totient is φ = 91853440.

The previous prime is 98989687. The next prime is 98989697. The reversal of 98989691 is 19698989.

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

It is a cyclic number.

It is not a de Polignac number, because 98989691 - 2² = 98989687 is a prime.

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 98989691.

It is not an unprimeable number, because it can be changed into a prime (98989697) 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, 39800 + ... + 42213.

It is an arithmetic number, because the mean of its divisors is an integer number (13286268).

Almost surely, 2^98989691 is an apocalyptic number.

98989691 is a deficient number, since it is larger than the sum of its proper divisors (7300453).

98989691 is a wasteful number, since it uses less digits than its factorization.

98989691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82101.

The product of its digits is 2519424, while the sum is 59.

The square root of 98989691 is about 9949.3563108374. The cubic root of 98989691 is about 462.5904430868.

The spelling of 98989691 in words is "ninety-eight million, nine hundred eighty-nine thousand, six hundred ninety-one".