7944621 has 4 divisors (see below), whose sum is σ = 10592832. Its totient is φ = 5296412.

The previous prime is 7944589. The next prime is 7944631. The reversal of 7944621 is 1264497.

It is a happy number.

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 not a de Polignac number, because 7944621 - 2⁵ = 7944589 is a prime.

7944621 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944631) 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, 1324101 + ... + 1324106.

It is an arithmetic number, because the mean of its divisors is an integer number (2648208).

Almost surely, 2^7944621 is an apocalyptic number.

It is an amenable number.

7944621 is a deficient number, since it is larger than the sum of its proper divisors (2648211).

7944621 is a wasteful number, since it uses less digits than its factorization.

7944621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2648210.

The product of its digits is 12096, while the sum is 33.

The square root of 7944621 is about 2818.6204072205. The cubic root of 7944621 is about 199.5374393463.

The spelling of 7944621 in words is "seven million, nine hundred forty-four thousand, six hundred twenty-one".