74545817 has 2 divisors, whose sum is σ = 74545818. Its totient is φ = 74545816.

The previous prime is 74545781. The next prime is 74545819. The reversal of 74545817 is 71854547.

Together with previous prime (74545781) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67634176 + 6911641 = 8224^2 + 2629^2 .

It is a cyclic number.

It is not a de Polignac number, because 74545817 - 2⁶ = 74545753 is a prime.

Together with 74545819, 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 (74545819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37272908 + 37272909.

It is an arithmetic number, because the mean of its divisors is an integer number (37272909).

Almost surely, 2^74545817 is an apocalyptic number.

It is an amenable number.

74545817 is a deficient number, since it is larger than the sum of its proper divisors (1).

74545817 is an equidigital number, since it uses as much as digits as its factorization.

74545817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 156800, while the sum is 41.

The square root of 74545817 is about 8633.9919504248. The cubic root of 74545817 is about 420.8633356340.

The spelling of 74545817 in words is "seventy-four million, five hundred forty-five thousand, eight hundred seventeen".