74192729 has 4 divisors (see below), whose sum is σ = 79899876. Its totient is φ = 68485584.

The previous prime is 74192717. The next prime is 74192731. The reversal of 74192729 is 92729147.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5053504 + 69139225 = 2248^2 + 8315^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74192729 is a prime.

It is a super-2 number, since 2×74192729² = 11009122072934882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74192429) 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 3 ways as a sum of consecutive naturals, for example, 2853554 + ... + 2853579.

It is an arithmetic number, because the mean of its divisors is an integer number (19974969).

Almost surely, 2^74192729 is an apocalyptic number.

It is an amenable number.

74192729 is a deficient number, since it is larger than the sum of its proper divisors (5707147).

74192729 is a wasteful number, since it uses less digits than its factorization.

74192729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5707146.

The product of its digits is 63504, while the sum is 41.

The square root of 74192729 is about 8613.5201282635. The cubic root of 74192729 is about 420.1978074287.

The spelling of 74192729 in words is "seventy-four million, one hundred ninety-two thousand, seven hundred twenty-nine".