74186081 has 2 divisors, whose sum is σ = 74186082. Its totient is φ = 74186080.

The previous prime is 74186071. The next prime is 74186087. The reversal of 74186081 is 18068147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68227600 + 5958481 = 8260^2 + 2441^2 .

It is an emirp because it is prime and its reverse (18068147) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74186081 - 2¹⁰ = 74185057 is a prime.

It is a super-2 number, since 2×74186081² = 11007149228277122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (74186087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37093040 + 37093041.

It is an arithmetic number, because the mean of its divisors is an integer number (37093041).

Almost surely, 2^74186081 is an apocalyptic number.

It is an amenable number.

74186081 is a deficient number, since it is larger than the sum of its proper divisors (1).

74186081 is an equidigital number, since it uses as much as digits as its factorization.

74186081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 74186081 is about 8613.1342146747. The cubic root of 74186081 is about 420.1852565202.

The spelling of 74186081 in words is "seventy-four million, one hundred eighty-six thousand, eighty-one".