4891567 has 2 divisors, whose sum is σ = 4891568. Its totient is φ = 4891566.

The previous prime is 4891559. The next prime is 4891591. The reversal of 4891567 is 7651984.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 4891567 - 2³ = 4891559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4891507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2445783 + 2445784.

It is an arithmetic number, because the mean of its divisors is an integer number (2445784).

Almost surely, 2^4891567 is an apocalyptic number.

4891567 is a deficient number, since it is larger than the sum of its proper divisors (1).

4891567 is an equidigital number, since it uses as much as digits as its factorization.

4891567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 40.

The square root of 4891567 is about 2211.6887213168. The cubic root of 4891567 is about 169.7524308770.

The spelling of 4891567 in words is "four million, eight hundred ninety-one thousand, five hundred sixty-seven".