74788117 has 4 divisors (see below), whose sum is σ = 79187436. Its totient is φ = 70388800.

The previous prime is 74788099. The next prime is 74788121. The reversal of 74788117 is 71188747.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71188747 = 7 ⋅10169821.

It can be written as a sum of positive squares in 2 ways, for example, as 49477156 + 25310961 = 7034^2 + 5031^2 .

It is a cyclic number.

It is not a de Polignac number, because 74788117 - 2¹¹ = 74786069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74788517) 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, 2199634 + ... + 2199667.

It is an arithmetic number, because the mean of its divisors is an integer number (19796859).

Almost surely, 2^74788117 is an apocalyptic number.

It is an amenable number.

74788117 is a deficient number, since it is larger than the sum of its proper divisors (4399319).

74788117 is a wasteful number, since it uses less digits than its factorization.

74788117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4399318.

The product of its digits is 87808, while the sum is 43.

The square root of 74788117 is about 8648.0123149774. The cubic root of 74788117 is about 421.3188268759.

The spelling of 74788117 in words is "seventy-four million, seven hundred eighty-eight thousand, one hundred seventeen".