7643161 has 2 divisors, whose sum is σ = 7643162. Its totient is φ = 7643160.

The previous prime is 7643137. The next prime is 7643191. The reversal of 7643161 is 1613467.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6528025 + 1115136 = 2555^2 + 1056^2 .

It is a cyclic number.

It is not a de Polignac number, because 7643161 - 2⁷ = 7643033 is a prime.

It is not a weakly prime, because it can be changed into another prime (7643131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3821580 + 3821581.

It is an arithmetic number, because the mean of its divisors is an integer number (3821581).

Almost surely, 2^7643161 is an apocalyptic number.

It is an amenable number.

7643161 is a deficient number, since it is larger than the sum of its proper divisors (1).

7643161 is an equidigital number, since it uses as much as digits as its factorization.

7643161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3024, while the sum is 28.

The square root of 7643161 is about 2764.6267379160. The cubic root of 7643161 is about 196.9809991380.

The spelling of 7643161 in words is "seven million, six hundred forty-three thousand, one hundred sixty-one".