99800101 has 2 divisors, whose sum is σ = 99800102. Its totient is φ = 99800100.

The previous prime is 99800089. The next prime is 99800111. The reversal of 99800101 is 10100899.

It is a Cunningham number, because it is equal to 9990²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 99800100 + 1 = 9990^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 99800101 - 2⁵ = 99800069 is a prime.

It is a super-2 number, since 2×99800101² = 19920120319220402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99800101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99800111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49900050 + 49900051.

It is an arithmetic number, because the mean of its divisors is an integer number (49900051).

Almost surely, 2^99800101 is an apocalyptic number.

It is an amenable number.

99800101 is a deficient number, since it is larger than the sum of its proper divisors (1).

99800101 is an equidigital number, since it uses as much as digits as its factorization.

99800101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 99800101 is about 9990.0000500500. Note that the first 4 decimals coincide. The cubic root of 99800101 is about 463.8493940588.

The spelling of 99800101 in words is "ninety-nine million, eight hundred thousand, one hundred one".