9611921 has 8 divisors (see below), whose sum is σ = 10684224. Its totient is φ = 8572720.

The previous prime is 9611881. The next prime is 9611939. The reversal of 9611921 is 1291169.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9611921 - 2¹⁰ = 9610897 is a prime.

It is a pancake number, because a pancake can be divided into 9611921 parts by 4384 straight cuts.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9611941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7661 + ... + 8826.

It is an arithmetic number, because the mean of its divisors is an integer number (1335528).

Almost surely, 2^9611921 is an apocalyptic number.

It is an amenable number.

9611921 is a deficient number, since it is larger than the sum of its proper divisors (1072303).

9611921 is a wasteful number, since it uses less digits than its factorization.

9611921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16551.

The product of its digits is 972, while the sum is 29.

The square root of 9611921 is about 3100.3098232273. The cubic root of 9611921 is about 212.6196493424.

It can be divided in two parts, 961 and 1921, that multiplied together give a triangular number (1846081 = T₁₉₂₁).

The spelling of 9611921 in words is "nine million, six hundred eleven thousand, nine hundred twenty-one".