4161691 has 2 divisors, whose sum is σ = 4161692. Its totient is φ = 4161690.

The previous prime is 4161679. The next prime is 4161697. The reversal of 4161691 is 1961614.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4161691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (4161697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2080845 + 2080846.

It is an arithmetic number, because the mean of its divisors is an integer number (2080846).

Almost surely, 2^4161691 is an apocalyptic number.

4161691 is a deficient number, since it is larger than the sum of its proper divisors (1).

4161691 is an equidigital number, since it uses as much as digits as its factorization.

4161691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1296, while the sum is 28.

The square root of 4161691 is about 2040.0223037996. The cubic root of 4161691 is about 160.8508192096.

The spelling of 4161691 in words is "four million, one hundred sixty-one thousand, six hundred ninety-one".