75055891 has 4 divisors (see below), whose sum is σ = 75534112. Its totient is φ = 74577672.

The previous prime is 75055859. The next prime is 75055907. The reversal of 75055891 is 19855057.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19855057 = 19 ⋅1045003.

It is a cyclic number.

It is not a de Polignac number, because 75055891 - 2⁵ = 75055859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75055801) 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, 238875 + ... + 239188.

It is an arithmetic number, because the mean of its divisors is an integer number (18883528).

Almost surely, 2^75055891 is an apocalyptic number.

75055891 is a deficient number, since it is larger than the sum of its proper divisors (478221).

75055891 is a wasteful number, since it uses less digits than its factorization.

75055891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478220.

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 75055891 is about 8663.4803052815. The cubic root of 75055891 is about 421.8210628511.

The spelling of 75055891 in words is "seventy-five million, fifty-five thousand, eight hundred ninety-one".