7644641 has 4 divisors (see below), whose sum is σ = 7752384. Its totient is φ = 7536900.

The previous prime is 7644617. The next prime is 7644653. The reversal of 7644641 is 1464467.

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-7644641 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7644598 and 7644607.

It is not an unprimeable number, because it can be changed into a prime (7644601) 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, 53765 + ... + 53906.

It is an arithmetic number, because the mean of its divisors is an integer number (1938096).

Almost surely, 2^7644641 is an apocalyptic number.

7644641 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

7644641 is a deficient number, since it is larger than the sum of its proper divisors (107743).

7644641 is a wasteful number, since it uses less digits than its factorization.

7644641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107742.

The product of its digits is 16128, while the sum is 32.

The square root of 7644641 is about 2764.8943921966. The cubic root of 7644641 is about 196.9937125979.

The spelling of 7644641 in words is "seven million, six hundred forty-four thousand, six hundred forty-one".