99897989101 has 16 divisors (see below), whose sum is σ = 102365548416. Its totient is φ = 97461000000.

The previous prime is 99897989057. The next prime is 99897989123. The reversal of 99897989101 is 10198979899.

It is a 3-Lehmer number, since φ(99897989101) divides (99897989101-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 99897989101 - 2¹³ = 99897980909 is a prime.

It is a deceptive number, since it divides R_99897989100.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99897989171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19581451 + ... + 19586551.

It is an arithmetic number, because the mean of its divisors is an integer number (6397846776).

It is a Poulet number, since it divides 2^99897989100-1.

Almost surely, 2^99897989101 is an apocalyptic number.

It is an amenable number.

99897989101 is a deficient number, since it is larger than the sum of its proper divisors (2467559315).

99897989101 is a wasteful number, since it uses less digits than its factorization.

99897989101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8004.

The product of its (nonzero) digits is 26453952, while the sum is 70.

The spelling of 99897989101 in words is "ninety-nine billion, eight hundred ninety-seven million, nine hundred eighty-nine thousand, one hundred one".