7644253 has 2 divisors, whose sum is σ = 7644254. Its totient is φ = 7644252.

The previous prime is 7644229. The next prime is 7644269. The reversal of 7644253 is 3524467.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7086244 + 558009 = 2662^2 + 747^2 .

It is an emirp because it is prime and its reverse (3524467) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7644253 is a prime.

It is a d-powerful number, because it can be written as 7⁸ + 6⁷ + 4 + 4² + 2¹¹ + 5⁵ + 3¹³ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7644223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3822126 + 3822127.

It is an arithmetic number, because the mean of its divisors is an integer number (3822127).

Almost surely, 2^7644253 is an apocalyptic number.

It is an amenable number.

7644253 is a deficient number, since it is larger than the sum of its proper divisors (1).

7644253 is an equidigital number, since it uses as much as digits as its factorization.

7644253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 31.

The square root of 7644253 is about 2764.8242258777. The cubic root of 7644253 is about 196.9903797685.

The spelling of 7644253 in words is "seven million, six hundred forty-four thousand, two hundred fifty-three".