4978657 has 2 divisors, whose sum is σ = 4978658. Its totient is φ = 4978656.

The previous prime is 4978651. The next prime is 4978681. The reversal of 4978657 is 7568794.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4977361 + 1296 = 2231^2 + 36^2 .

It is a cyclic number.

It is not a de Polignac number, because 4978657 - 2¹⁹ = 4454369 is a prime.

It is not a weakly prime, because it can be changed into another prime (4978651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2489328 + 2489329.

It is an arithmetic number, because the mean of its divisors is an integer number (2489329).

Almost surely, 2^4978657 is an apocalyptic number.

It is an amenable number.

4978657 is a deficient number, since it is larger than the sum of its proper divisors (1).

4978657 is an equidigital number, since it uses as much as digits as its factorization.

4978657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 46.

The square root of 4978657 is about 2231.2904338073. The cubic root of 4978657 is about 170.7539408737.

The spelling of 4978657 in words is "four million, nine hundred seventy-eight thousand, six hundred fifty-seven".