74405117 has 4 divisors (see below), whose sum is σ = 74449596. Its totient is φ = 74360640.

The previous prime is 74405059. The next prime is 74405143. The reversal of 74405117 is 71150447.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71150447 = 577 ⋅123311.

It can be written as a sum of positive squares in 2 ways, for example, as 18887716 + 55517401 = 4346^2 + 7451^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74405117 is a prime.

It is a super-2 number, since 2×74405117² = 11072242871567378, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 74405117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74405417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19628 + ... + 23109.

It is an arithmetic number, because the mean of its divisors is an integer number (18612399).

Almost surely, 2^74405117 is an apocalyptic number.

It is an amenable number.

74405117 is a deficient number, since it is larger than the sum of its proper divisors (44479).

74405117 is a wasteful number, since it uses less digits than its factorization.

74405117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44478.

The product of its (nonzero) digits is 3920, while the sum is 29.

The square root of 74405117 is about 8625.8400750304. The cubic root of 74405117 is about 420.5983855320.

The spelling of 74405117 in words is "seventy-four million, four hundred five thousand, one hundred seventeen".