4957891 has 2 divisors, whose sum is σ = 4957892. Its totient is φ = 4957890.

The previous prime is 4957873. The next prime is 4957913. The reversal of 4957891 is 1987594.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4957891 - 2¹³ = 4949699 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (4957801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2478945 + 2478946.

It is an arithmetic number, because the mean of its divisors is an integer number (2478946).

Almost surely, 2^4957891 is an apocalyptic number.

4957891 is a deficient number, since it is larger than the sum of its proper divisors (1).

4957891 is an equidigital number, since it uses as much as digits as its factorization.

4957891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 4957891 is about 2226.6322103122. The cubic root of 4957891 is about 170.5162048908.

The spelling of 4957891 in words is "four million, nine hundred fifty-seven thousand, eight hundred ninety-one".