74845553 has 2 divisors, whose sum is σ = 74845554. Its totient is φ = 74845552.

The previous prime is 74845517. The next prime is 74845567. The reversal of 74845553 is 35554847.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62853184 + 11992369 = 7928^2 + 3463^2 .

It is an emirp because it is prime and its reverse (35554847) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74845553 - 2⁶ = 74845489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 74845553.

It is not a weakly prime, because it can be changed into another prime (74841553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37422776 + 37422777.

It is an arithmetic number, because the mean of its divisors is an integer number (37422777).

Almost surely, 2^74845553 is an apocalyptic number.

It is an amenable number.

74845553 is a deficient number, since it is larger than the sum of its proper divisors (1).

74845553 is an equidigital number, since it uses as much as digits as its factorization.

74845553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 41.

The square root of 74845553 is about 8651.3324407284. The cubic root of 74845553 is about 421.4266545049.

The spelling of 74845553 in words is "seventy-four million, eight hundred forty-five thousand, five hundred fifty-three".