99100001 has 24 divisors (see below), whose sum is σ = 135442944. Its totient is φ = 71275680.

The previous prime is 99099977. The next prime is 99100007. The reversal of 99100001 is 10000199.

It is not a de Polignac number, because 99100001 - 2¹⁸ = 98837857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99100007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65 + ... + 14078.

It is an arithmetic number, because the mean of its divisors is an integer number (5643456).

Almost surely, 2^99100001 is an apocalyptic number.

99100001 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99100001 is a deficient number, since it is larger than the sum of its proper divisors (36342943).

99100001 is a wasteful number, since it uses less digits than its factorization.

99100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14181 (or 14174 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 99100001 is about 9954.8983420224. The cubic root of 99100001 is about 462.7622098245.

It can be divided in two parts, 99 and 100001, that multiplied together give a palindrome (9900099).

The spelling of 99100001 in words is "ninety-nine million, one hundred thousand, one".