99897723 has 12 divisors (see below), whose sum is σ = 144836640. Its totient is φ = 66349296.

The previous prime is 99897713. The next prime is 99897727. The reversal of 99897723 is 32779899.

It is not a de Polignac number, because 99897723 - 2⁵ = 99897691 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99897723.

It is not an unprimeable number, because it can be changed into a prime (99897727) 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, 18211 + ... + 23052.

It is an arithmetic number, because the mean of its divisors is an integer number (12069720).

Almost surely, 2^99897723 is an apocalyptic number.

99897723 is a deficient number, since it is larger than the sum of its proper divisors (44938917).

99897723 is a wasteful number, since it uses less digits than its factorization.

99897723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41538 (or 41535 counting only the distinct ones).

The product of its digits is 1714608, while the sum is 54.

The square root of 99897723 is about 9994.8848417578. The cubic root of 99897723 is about 464.0005867883. Note that the first 3 decimals are identical.

The spelling of 99897723 in words is "ninety-nine million, eight hundred ninety-seven thousand, seven hundred twenty-three".