4891057 has 2 divisors, whose sum is σ = 4891058. Its totient is φ = 4891056.

The previous prime is 4891043. The next prime is 4891063. The reversal of 4891057 is 7501984.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4844401 + 46656 = 2201^2 + 216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4891057 is a prime.

4891057 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4891027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445528 + 2445529.

It is an arithmetic number, because the mean of its divisors is an integer number (2445529).

Almost surely, 2^4891057 is an apocalyptic number.

It is an amenable number.

4891057 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891057 is an equidigital number, since it uses as much as digits as its factorization.

4891057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 4891057 is about 2211.5734217973. The cubic root of 4891057 is about 169.7465311487.

The spelling of 4891057 in words is "four million, eight hundred ninety-one thousand, fifty-seven".