983609857 has 2 divisors, whose sum is σ = 983609858. Its totient is φ = 983609856.

The previous prime is 983609807. The next prime is 983609863. The reversal of 983609857 is 758906389.

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., 772895601 + 210714256 = 27801^2 + 14516^2 .

It is an emirp because it is prime and its reverse (758906389) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 983609857 - 2⁷ = 983609729 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 983609798 and 983609807.

It is not a weakly prime, because it can be changed into another prime (983609807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491804928 + 491804929.

It is an arithmetic number, because the mean of its divisors is an integer number (491804929).

Almost surely, 2^983609857 is an apocalyptic number.

It is an amenable number.

983609857 is a deficient number, since it is larger than the sum of its proper divisors (1).

983609857 is an equidigital number, since it uses as much as digits as its factorization.

983609857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 983609857 is about 31362.5550139015. Note that the first 3 decimals coincide. The cubic root of 983609857 is about 994.5064956723.

The spelling of 983609857 in words is "nine hundred eighty-three million, six hundred nine thousand, eight hundred fifty-seven".