9901217 has 4 divisors (see below), whose sum is σ = 9927060. Its totient is φ = 9875376.

The previous prime is 9901211. The next prime is 9901219. The reversal of 9901217 is 7121099.

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 3530641 + 6370576 = 1879^2 + 2524^2 .

It is a cyclic number.

It is not a de Polignac number, because 9901217 - 2¹⁶ = 9835681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9901217.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9901211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12338 + ... + 13115.

It is an arithmetic number, because the mean of its divisors is an integer number (2481765).

Almost surely, 2^9901217 is an apocalyptic number.

It is an amenable number.

9901217 is a deficient number, since it is larger than the sum of its proper divisors (25843).

9901217 is a wasteful number, since it uses less digits than its factorization.

9901217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25842.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 9901217 is about 3146.6199325626. The cubic root of 9901217 is about 214.7317151202.

The spelling of 9901217 in words is "nine million, nine hundred one thousand, two hundred seventeen".