9620921 has 4 divisors (see below), whose sum is σ = 9714432. Its totient is φ = 9527412.

The previous prime is 9620917. The next prime is 9620927. The reversal of 9620921 is 1290269.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1290269 = 1087 ⋅1187.

It is a cyclic number.

It is not a de Polignac number, because 9620921 - 2² = 9620917 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 (9620927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46601 + ... + 46806.

It is an arithmetic number, because the mean of its divisors is an integer number (2428608).

Almost surely, 2^9620921 is an apocalyptic number.

It is an amenable number.

9620921 is a deficient number, since it is larger than the sum of its proper divisors (93511).

9620921 is a wasteful number, since it uses less digits than its factorization.

9620921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93510.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 9620921 is about 3101.7609514597. The cubic root of 9620921 is about 212.6859898760.

The spelling of 9620921 in words is "nine million, six hundred twenty thousand, nine hundred twenty-one".