74401181 has 2 divisors, whose sum is σ = 74401182. Its totient is φ = 74401180.

The previous prime is 74401177. The next prime is 74401189. The reversal of 74401181 is 18110447.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 6421156 = 8245^2 + 2534^2 .

It is an emirp because it is prime and its reverse (18110447) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74401181 - 2² = 74401177 is a prime.

It is a super-2 number, since 2×74401181² = 11071071468389522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74401181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74401189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37200590 + 37200591.

It is an arithmetic number, because the mean of its divisors is an integer number (37200591).

Almost surely, 2^74401181 is an apocalyptic number.

It is an amenable number.

74401181 is a deficient number, since it is larger than the sum of its proper divisors (1).

74401181 is an equidigital number, since it uses as much as digits as its factorization.

74401181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 74401181 is about 8625.6119203219. The cubic root of 74401181 is about 420.5909689075.

The spelling of 74401181 in words is "seventy-four million, four hundred one thousand, one hundred eighty-one".