9910621 has 4 divisors (see below), whose sum is σ = 11326432. Its totient is φ = 8494812.

The previous prime is 9910601. The next prime is 9910627. The reversal of 9910621 is 1260199.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9910621 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 9910621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9910627) 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, 707895 + ... + 707908.

It is an arithmetic number, because the mean of its divisors is an integer number (2831608).

Almost surely, 2^9910621 is an apocalyptic number.

It is an amenable number.

9910621 is a deficient number, since it is larger than the sum of its proper divisors (1415811).

9910621 is a wasteful number, since it uses less digits than its factorization.

9910621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1415810.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 9910621 is about 3148.1138797699. The cubic root of 9910621 is about 214.7996763979.

The spelling of 9910621 in words is "nine million, nine hundred ten thousand, six hundred twenty-one".