99698521 has 8 divisors (see below), whose sum is σ = 108662400. Its totient is φ = 90919632.

The previous prime is 99698507. The next prime is 99698531. The reversal of 99698521 is 12589699.

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 99698521 - 2²³ = 91309913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99698531) 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, 45121 + ... + 47278.

It is an arithmetic number, because the mean of its divisors is an integer number (13582800).

Almost surely, 2^99698521 is an apocalyptic number.

It is an amenable number.

99698521 is a deficient number, since it is larger than the sum of its proper divisors (8963879).

99698521 is a wasteful number, since it uses less digits than its factorization.

99698521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92495.

The product of its digits is 349920, while the sum is 49.

The square root of 99698521 is about 9984.9146716434. The cubic root of 99698521 is about 463.6919666412.

The spelling of 99698521 in words is "ninety-nine million, six hundred ninety-eight thousand, five hundred twenty-one".