99997618 has 24 divisors (see below), whose sum is σ = 175549248. Its totient is φ = 41848632.

The previous prime is 99997609. The next prime is 99997619. The reversal of 99997618 is 81679999.

It is not an unprimeable number, because it can be changed into a prime (99997619) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23955 + ... + 27817.

It is an arithmetic number, because the mean of its divisors is an integer number (7314552).

Almost surely, 2^99997618 is an apocalyptic number.

99997618 is a deficient number, since it is larger than the sum of its proper divisors (75551630).

99997618 is a wasteful number, since it uses less digits than its factorization.

99997618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3958 (or 3915 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 58.

The square root of 99997618 is about 9999.8808992908. The cubic root of 99997618 is about 464.1551979105.

The spelling of 99997618 in words is "ninety-nine million, nine hundred ninety-seven thousand, six hundred eighteen".