74905605 has 12 divisors (see below), whose sum is σ = 129836460. Its totient is φ = 39949632.

The previous prime is 74905603. The next prime is 74905609. The reversal of 74905605 is 50650947.

74905605 is a `hidden beast` number, since 7 + 4 + 90 + 560 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 56295009 + 18610596 = 7503^2 + 4314^2 .

It is not a de Polignac number, because 74905605 - 2¹ = 74905603 is a prime.

It is a super-2 number, since 2×74905605² = 11221699320832050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 74905605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74905601) 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 in 11 ways as a sum of consecutive naturals, for example, 832240 + ... + 832329.

It is an arithmetic number, because the mean of its divisors is an integer number (10819705).

Almost surely, 2^74905605 is an apocalyptic number.

It is an amenable number.

74905605 is a deficient number, since it is larger than the sum of its proper divisors (54930855).

74905605 is a wasteful number, since it uses less digits than its factorization.

74905605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664580 (or 1664577 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 74905605 is about 8654.8024240880. The cubic root of 74905605 is about 421.5393343146.

The spelling of 74905605 in words is "seventy-four million, nine hundred five thousand, six hundred five".