4678549 has 2 divisors, whose sum is σ = 4678550. Its totient is φ = 4678548.

The previous prime is 4678547. The next prime is 4678561. The reversal of 4678549 is 9458764.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3900625 + 777924 = 1975^2 + 882^2 .

It is a cyclic number.

It is not a de Polignac number, because 4678549 - 2¹ = 4678547 is a prime.

Together with 4678547, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 4² + 6⁸ + 7⁷ + 8⁷ + 5⁷ + 4² + 9² .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4678547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2339274 + 2339275.

It is an arithmetic number, because the mean of its divisors is an integer number (2339275).

Almost surely, 2^4678549 is an apocalyptic number.

It is an amenable number.

4678549 is a deficient number, since it is larger than the sum of its proper divisors (1).

4678549 is an equidigital number, since it uses as much as digits as its factorization.

4678549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The square root of 4678549 is about 2162.9953767866. The cubic root of 4678549 is about 167.2516435215.

The spelling of 4678549 in words is "four million, six hundred seventy-eight thousand, five hundred forty-nine".