99921598 has 16 divisors (see below), whose sum is σ = 172016640. Its totient is φ = 42642936.

The previous prime is 99921533. The next prime is 99921607. The reversal of 99921598 is 89512999.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11586 + ... + 18277.

It is an arithmetic number, because the mean of its divisors is an integer number (10751040).

Almost surely, 2^99921598 is an apocalyptic number.

99921598 is a deficient number, since it is larger than the sum of its proper divisors (72095042).

99921598 is a wasteful number, since it uses less digits than its factorization.

99921598 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30111.

The product of its digits is 524880, while the sum is 52.

The square root of 99921598 is about 9996.0791313394. The cubic root of 99921598 is about 464.0375483635.

The spelling of 99921598 in words is "ninety-nine million, nine hundred twenty-one thousand, five hundred ninety-eight".