7643197 has 2 divisors, whose sum is σ = 7643198. Its totient is φ = 7643196.

The previous prime is 7643191. The next prime is 7643203. The reversal of 7643197 is 7913467.

It is a balanced prime because it is at equal distance from previous prime (7643191) and next prime (7643203).

It can be written as a sum of positive squares in only one way, i.e., 6584356 + 1058841 = 2566^2 + 1029^2 .

It is an emirp because it is prime and its reverse (7913467) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7643197 is a prime.

It is a d-powerful number, because it can be written as 7⁵ + 6⁸ + 4⁶ + 3¹¹ + 1 + 9³ + 7⁸ .

7643197 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7643191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821598 + 3821599.

It is an arithmetic number, because the mean of its divisors is an integer number (3821599).

Almost surely, 2^7643197 is an apocalyptic number.

It is an amenable number.

7643197 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643197 is an equidigital number, since it uses as much as digits as its factorization.

7643197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31752, while the sum is 37.

The square root of 7643197 is about 2764.6332487330. The cubic root of 7643197 is about 196.9813084038.

It can be divided in two parts, 7 and 643197, that added together give a square (643204 = 802²).

The spelling of 7643197 in words is "seven million, six hundred forty-three thousand, one hundred ninety-seven".