57920191 has 4 divisors (see below), whose sum is σ = 66194512. Its totient is φ = 49645872.

The previous prime is 57920153. The next prime is 57920197. The reversal of 57920191 is 19102975.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 57920191 - 2⁹ = 57919679 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 (57920197) 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, 4137150 + ... + 4137163.

It is an arithmetic number, because the mean of its divisors is an integer number (16548628).

Almost surely, 2^57920191 is an apocalyptic number.

57920191 is a deficient number, since it is larger than the sum of its proper divisors (8274321).

57920191 is an equidigital number, since it uses as much as digits as its factorization.

57920191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8274320.

The product of its (nonzero) digits is 5670, while the sum is 34.

The square root of 57920191 is about 7610.5315845872. The cubic root of 57920191 is about 386.9100361316.

The spelling of 57920191 in words is "fifty-seven million, nine hundred twenty thousand, one hundred ninety-one".