74539905 has 32 divisors (see below), whose sum is σ = 130664448. Its totient is φ = 35985600.

The previous prime is 74539901. The next prime is 74539921. The reversal of 74539905 is 50993547.

It is not a de Polignac number, because 74539905 - 2² = 74539901 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (74539901) 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 in 31 ways as a sum of consecutive naturals, for example, 43882 + ... + 45548.

It is an arithmetic number, because the mean of its divisors is an integer number (4083264).

Almost surely, 2^74539905 is an apocalyptic number.

It is an amenable number.

74539905 is a deficient number, since it is larger than the sum of its proper divisors (56124543).

74539905 is a wasteful number, since it uses less digits than its factorization.

74539905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957.

The product of its (nonzero) digits is 170100, while the sum is 42.

The square root of 74539905 is about 8633.6495759325. The cubic root of 74539905 is about 420.8522095466.

The spelling of 74539905 in words is "seventy-four million, five hundred thirty-nine thousand, nine hundred five".