9617621 has 6 divisors (see below), whose sum is σ = 10414530. Its totient is φ = 8877648.

The previous prime is 9617617. The next prime is 9617623. The reversal of 9617621 is 1267169.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 192721 + 9424900 = 439^2 + 3070^2 .

It is not a de Polignac number, because 9617621 - 2² = 9617617 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 (9617623) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 28286 + ... + 28623.

It is an arithmetic number, because the mean of its divisors is an integer number (1735755).

Almost surely, 2^9617621 is an apocalyptic number.

It is an amenable number.

9617621 is a deficient number, since it is larger than the sum of its proper divisors (796909).

9617621 is a wasteful number, since it uses less digits than its factorization.

9617621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56935 (or 56922 counting only the distinct ones).

The product of its digits is 4536, while the sum is 32.

The square root of 9617621 is about 3101.2289499487. The cubic root of 9617621 is about 212.6616698195.

The spelling of 9617621 in words is "nine million, six hundred seventeen thousand, six hundred twenty-one".