74985749 has 2 divisors, whose sum is σ = 74985750. Its totient is φ = 74985748.

The previous prime is 74985739. The next prime is 74985763. The reversal of 74985749 is 94758947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41692849 + 33292900 = 6457^2 + 5770^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74985749 is a prime.

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 74985749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (74985709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37492874 + 37492875.

It is an arithmetic number, because the mean of its divisors is an integer number (37492875).

Almost surely, 2^74985749 is an apocalyptic number.

It is an amenable number.

74985749 is a deficient number, since it is larger than the sum of its proper divisors (1).

74985749 is an equidigital number, since it uses as much as digits as its factorization.

74985749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2540160, while the sum is 53.

The square root of 74985749 is about 8659.4312168872. The cubic root of 74985749 is about 421.6896203835.

The spelling of 74985749 in words is "seventy-four million, nine hundred eighty-five thousand, seven hundred forty-nine".