9523621 has 4 divisors (see below), whose sum is σ = 10083852. Its totient is φ = 8963392.

The previous prime is 9523609. The next prime is 9523637. The reversal of 9523621 is 1263259.

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 7452900 + 2070721 = 2730^2 + 1439^2 .

It is a cyclic number.

It is not a de Polignac number, because 9523621 - 2⁵ = 9523589 is a prime.

It is an Ulam number.

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 9523621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9523681) 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, 280090 + ... + 280123.

It is an arithmetic number, because the mean of its divisors is an integer number (2520963).

Almost surely, 2^9523621 is an apocalyptic number.

It is an amenable number.

9523621 is a deficient number, since it is larger than the sum of its proper divisors (560231).

9523621 is a wasteful number, since it uses less digits than its factorization.

9523621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560230.

The product of its digits is 3240, while the sum is 28.

The square root of 9523621 is about 3086.0364547426. The cubic root of 9523621 is about 211.9665679451.

It can be divided in two parts, 95 and 23621, that added together give a square (23716 = 154²).

The spelling of 9523621 in words is "nine million, five hundred twenty-three thousand, six hundred twenty-one".