75478447 has 8 divisors (see below), whose sum is σ = 82414080. Its totient is φ = 68555160.

The previous prime is 75478427. The next prime is 75478471. The reversal of 75478447 is 74487457.

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 75478447 - 2²³ = 67089839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75478397 and 75478406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75478427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13698 + ... + 18400.

It is an arithmetic number, because the mean of its divisors is an integer number (10301760).

Almost surely, 2^75478447 is an apocalyptic number.

75478447 is a deficient number, since it is larger than the sum of its proper divisors (6935633).

75478447 is a wasteful number, since it uses less digits than its factorization.

75478447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6173.

The product of its digits is 878080, while the sum is 46.

The square root of 75478447 is about 8687.8332741829. The cubic root of 75478447 is about 422.6111832315.

The spelling of 75478447 in words is "seventy-five million, four hundred seventy-eight thousand, four hundred forty-seven".