74418161 has 2 divisors, whose sum is σ = 74418162. Its totient is φ = 74418160.

The previous prime is 74418121. The next prime is 74418167. The reversal of 74418161 is 16181447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61858225 + 12559936 = 7865^2 + 3544^2 .

It is an emirp because it is prime and its reverse (16181447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74418161 - 2¹⁰ = 74417137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (74418167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37209080 + 37209081.

It is an arithmetic number, because the mean of its divisors is an integer number (37209081).

Almost surely, 2^74418161 is an apocalyptic number.

It is an amenable number.

74418161 is a deficient number, since it is larger than the sum of its proper divisors (1).

74418161 is an equidigital number, since it uses as much as digits as its factorization.

74418161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5376, while the sum is 32.

The square root of 74418161 is about 8626.5961421641. The cubic root of 74418161 is about 420.6229625369.

The spelling of 74418161 in words is "seventy-four million, four hundred eighteen thousand, one hundred sixty-one".