74785549 has 2 divisors, whose sum is σ = 74785550. Its totient is φ = 74785548.

The previous prime is 74785531. The next prime is 74785553. The reversal of 74785549 is 94558747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74701449 + 84100 = 8643^2 + 290^2 .

It is an emirp because it is prime and its reverse (94558747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74785549 - 2⁷ = 74785421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74785559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37392774 + 37392775.

It is an arithmetic number, because the mean of its divisors is an integer number (37392775).

Almost surely, 2^74785549 is an apocalyptic number.

It is an amenable number.

74785549 is a deficient number, since it is larger than the sum of its proper divisors (1).

74785549 is an equidigital number, since it uses as much as digits as its factorization.

74785549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1411200, while the sum is 49.

The square root of 74785549 is about 8647.8638402787. The cubic root of 74785549 is about 421.3140045450.

The spelling of 74785549 in words is "seventy-four million, seven hundred eighty-five thousand, five hundred forty-nine".