983219917 has 2 divisors, whose sum is σ = 983219918. Its totient is φ = 983219916.

The previous prime is 983219911. The next prime is 983219921. The reversal of 983219917 is 719912389.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 981318276 + 1901641 = 31326^2 + 1379^2 .

It is a cyclic number.

It is not a de Polignac number, because 983219917 - 2⁷ = 983219789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (983219911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491609958 + 491609959.

It is an arithmetic number, because the mean of its divisors is an integer number (491609959).

Almost surely, 2^983219917 is an apocalyptic number.

It is an amenable number.

983219917 is a deficient number, since it is larger than the sum of its proper divisors (1).

983219917 is an equidigital number, since it uses as much as digits as its factorization.

983219917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 49.

The square root of 983219917 is about 31356.3377485318. The cubic root of 983219917 is about 994.3750583558.

It can be divided in two parts, 983 and 219917, that added together give a square (220900 = 470²).

The spelling of 983219917 in words is "nine hundred eighty-three million, two hundred nineteen thousand, nine hundred seventeen".