74543691 has 8 divisors (see below), whose sum is σ = 105238224. Its totient is φ = 46772480.

The previous prime is 74543663. The next prime is 74543701. The reversal of 74543691 is 19634547.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 74543691 - 2⁹ = 74543179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (74543611) 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 7 ways as a sum of consecutive naturals, for example, 730770 + ... + 730871.

It is an arithmetic number, because the mean of its divisors is an integer number (13154778).

Almost surely, 2^74543691 is an apocalyptic number.

74543691 is a deficient number, since it is larger than the sum of its proper divisors (30694533).

74543691 is a wasteful number, since it uses less digits than its factorization.

74543691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1461661.

The product of its digits is 90720, while the sum is 39.

The square root of 74543691 is about 8633.8688315262. The cubic root of 74543691 is about 420.8593346764.

The spelling of 74543691 in words is "seventy-four million, five hundred forty-three thousand, six hundred ninety-one".