74123081 has 2 divisors, whose sum is σ = 74123082. Its totient is φ = 74123080.

The previous prime is 74123051. The next prime is 74123087. The reversal of 74123081 is 18032147.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68740681 + 5382400 = 8291^2 + 2320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74123081 is a prime.

It is a super-2 number, since 2×74123081² = 10988462273865122, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74123081.

It is not a weakly prime, because it can be changed into another prime (74123087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37061540 + 37061541.

It is an arithmetic number, because the mean of its divisors is an integer number (37061541).

Almost surely, 2^74123081 is an apocalyptic number.

It is an amenable number.

74123081 is a deficient number, since it is larger than the sum of its proper divisors (1).

74123081 is an equidigital number, since it uses as much as digits as its factorization.

74123081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 74123081 is about 8609.4762326172. The cubic root of 74123081 is about 420.0662801671.

The spelling of 74123081 in words is "seventy-four million, one hundred twenty-three thousand, eighty-one".