900910001 has 4 divisors (see below), whose sum is σ = 909830004. Its totient is φ = 891990000.

The previous prime is 900909991. The next prime is 900910063. The reversal of 900910001 is 100019009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100019009 = 509 ⋅196501.

It can be written as a sum of positive squares in 2 ways, for example, as 800890000 + 100020001 = 28300^2 + 10001^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-900910001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (900900001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4459850 + ... + 4460051.

It is an arithmetic number, because the mean of its divisors is an integer number (227457501).

Almost surely, 2^900910001 is an apocalyptic number.

It is an amenable number.

900910001 is a deficient number, since it is larger than the sum of its proper divisors (8920003).

900910001 is a wasteful number, since it uses less digits than its factorization.

900910001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8920002.

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

The square root of 900910001 is about 30015.1628514656. The cubic root of 900910001 is about 965.8146810323.

It can be divided in two parts, 9009 and 10001, that multiplied together give a palindrome (90099009).

The spelling of 900910001 in words is "nine hundred million, nine hundred ten thousand, one".