74117729 has 4 divisors (see below), whose sum is σ = 84705984. Its totient is φ = 63529476.

The previous prime is 74117713. The next prime is 74117737. The reversal of 74117729 is 92771147.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 74117729 - 2⁴ = 74117713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74117692 and 74117701.

It is not an unprimeable number, because it can be changed into a prime (74117779) 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, 5294117 + ... + 5294130.

It is an arithmetic number, because the mean of its divisors is an integer number (21176496).

Almost surely, 2^74117729 is an apocalyptic number.

It is an amenable number.

74117729 is a deficient number, since it is larger than the sum of its proper divisors (10588255).

74117729 is a wasteful number, since it uses less digits than its factorization.

74117729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10588254.

The product of its digits is 24696, while the sum is 38.

The square root of 74117729 is about 8609.1654067046. The cubic root of 74117729 is about 420.0561697363.

The spelling of 74117729 in words is "seventy-four million, one hundred seventeen thousand, seven hundred twenty-nine".