74509729 has 16 divisors (see below), whose sum is σ = 88513920. Its totient is φ = 61367040.

The previous prime is 74509727. The next prime is 74509733. The reversal of 74509729 is 92790547.

It is not a de Polignac number, because 74509729 - 2¹ = 74509727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74509727) 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 15 ways as a sum of consecutive naturals, for example, 48162 + ... + 49684.

It is an arithmetic number, because the mean of its divisors is an integer number (5532120).

Almost surely, 2^74509729 is an apocalyptic number.

It is an amenable number.

74509729 is a deficient number, since it is larger than the sum of its proper divisors (14004191).

74509729 is a wasteful number, since it uses less digits than its factorization.

74509729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its (nonzero) digits is 158760, while the sum is 43.

The square root of 74509729 is about 8631.9018182553. The cubic root of 74509729 is about 420.7954106620.

The spelling of 74509729 in words is "seventy-four million, five hundred nine thousand, seven hundred twenty-nine".