99698587 has 4 divisors (see below), whose sum is σ = 99718560. Its totient is φ = 99678616.

The previous prime is 99698579. The next prime is 99698597. The reversal of 99698587 is 78589699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78589699 = 167 ⋅470597.

It is a cyclic number.

It is not a de Polignac number, because 99698587 - 2³ = 99698579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99698507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4773 + ... + 14905.

It is an arithmetic number, because the mean of its divisors is an integer number (24929640).

Almost surely, 2^99698587 is an apocalyptic number.

99698587 is a deficient number, since it is larger than the sum of its proper divisors (19973).

99698587 is a wasteful number, since it uses less digits than its factorization.

99698587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19972.

The product of its digits is 9797760, while the sum is 61.

The square root of 99698587 is about 9984.9179766286. The cubic root of 99698587 is about 463.6920689619.

The spelling of 99698587 in words is "ninety-nine million, six hundred ninety-eight thousand, five hundred eighty-seven".