40704161 has 2 divisors, whose sum is σ = 40704162. Its totient is φ = 40704160.

The previous prime is 40704151. The next prime is 40704163. The reversal of 40704161 is 16140704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39929761 + 774400 = 6319^2 + 880^2 .

It is a cyclic number.

It is not a de Polignac number, because 40704161 - 2¹⁰ = 40703137 is a prime.

Together with 40704163, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40704163) 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, 20352080 + 20352081.

It is an arithmetic number, because the mean of its divisors is an integer number (20352081).

Almost surely, 2^40704161 is an apocalyptic number.

It is an amenable number.

40704161 is a deficient number, since it is larger than the sum of its proper divisors (1).

40704161 is an equidigital number, since it uses as much as digits as its factorization.

40704161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 40704161 is about 6379.9812695650. The cubic root of 40704161 is about 343.9903576935.

Adding to 40704161 its reverse (16140704), we get a palindrome (56844865).

The spelling of 40704161 in words is "forty million, seven hundred four thousand, one hundred sixty-one".