9017421901 has 4 divisors (see below), whose sum is σ = 9026359900. Its totient is φ = 9008483904.

The previous prime is 9017421893. The next prime is 9017421913. The reversal of 9017421901 is 1091247109.

9017421901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1223180676 + 7794241225 = 34974^2 + 88285^2 .

It is a cyclic number.

It is not a de Polignac number, because 9017421901 - 2³ = 9017421893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9017451901) 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, 4467486 + ... + 4469503.

It is an arithmetic number, because the mean of its divisors is an integer number (2256589975).

Almost surely, 2^9017421901 is an apocalyptic number.

It is an amenable number.

9017421901 is a deficient number, since it is larger than the sum of its proper divisors (8937999).

9017421901 is a wasteful number, since it uses less digits than its factorization.

9017421901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8937998.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 9017421901 is about 94960.1068923156. The cubic root of 9017421901 is about 2081.4251436491.

The spelling of 9017421901 in words is "nine billion, seventeen million, four hundred twenty-one thousand, nine hundred one".