75056639 has 8 divisors (see below), whose sum is σ = 87397920. Its totient is φ = 63120096.

The previous prime is 75056633. The next prime is 75056677. The reversal of 75056639 is 93665057.

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 75056639 - 2²⁰ = 74008063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75056596 and 75056605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75056633) 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 7 ways as a sum of consecutive naturals, for example, 100784 + ... + 101525.

It is an arithmetic number, because the mean of its divisors is an integer number (10924740).

Almost surely, 2^75056639 is an apocalyptic number.

75056639 is a deficient number, since it is larger than the sum of its proper divisors (12341281).

75056639 is a wasteful number, since it uses less digits than its factorization.

75056639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202369.

The product of its (nonzero) digits is 170100, while the sum is 41.

The square root of 75056639 is about 8663.5234748917. The cubic root of 75056639 is about 421.8224641228.

The spelling of 75056639 in words is "seventy-five million, fifty-six thousand, six hundred thirty-nine".