75875821 has 4 divisors (see below), whose sum is σ = 86715232. Its totient is φ = 65036412.

The previous prime is 75875819. The next prime is 75875837. The reversal of 75875821 is 12857857.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 75875821 - 2¹ = 75875819 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 (75875801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5419695 + ... + 5419708.

It is an arithmetic number, because the mean of its divisors is an integer number (21678808).

Almost surely, 2^75875821 is an apocalyptic number.

It is an amenable number.

75875821 is a deficient number, since it is larger than the sum of its proper divisors (10839411).

75875821 is a wasteful number, since it uses less digits than its factorization.

75875821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10839410.

The product of its digits is 156800, while the sum is 43.

The square root of 75875821 is about 8710.6728213152. The cubic root of 75875821 is about 423.3515307586.

The spelling of 75875821 in words is "seventy-five million, eight hundred seventy-five thousand, eight hundred twenty-one".