4397986657 has 2 divisors, whose sum is σ = 4397986658. Its totient is φ = 4397986656.

The previous prime is 4397986651. The next prime is 4397986667. The reversal of 4397986657 is 7566897934.

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., 4396220416 + 1766241 = 66304^2 + 1329^2 .

It is a cyclic number.

It is not a de Polignac number, because 4397986657 - 2²³ = 4389598049 is a prime.

It is not a weakly prime, because it can be changed into another prime (4397986651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2198993328 + 2198993329.

It is an arithmetic number, because the mean of its divisors is an integer number (2198993329).

Almost surely, 2^4397986657 is an apocalyptic number.

It is an amenable number.

4397986657 is a deficient number, since it is larger than the sum of its proper divisors (1).

4397986657 is an equidigital number, since it uses as much as digits as its factorization.

4397986657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68584320, while the sum is 64.

The square root of 4397986657 is about 66317.3179267678. The cubic root of 4397986657 is about 1638.3925675025.

The spelling of 4397986657 in words is "four billion, three hundred ninety-seven million, nine hundred eighty-six thousand, six hundred fifty-seven".