983856109 has 2 divisors, whose sum is σ = 983856110. Its totient is φ = 983856108.

The previous prime is 983856091. The next prime is 983856121. The reversal of 983856109 is 901658389.

Together with previous prime (983856091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 967832100 + 16024009 = 31110^2 + 4003^2 .

It is a cyclic number.

It is not a de Polignac number, because 983856109 - 2¹⁵ = 983823341 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (983856149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 491928054 + 491928055.

It is an arithmetic number, because the mean of its divisors is an integer number (491928055).

Almost surely, 2^983856109 is an apocalyptic number.

It is an amenable number.

983856109 is a deficient number, since it is larger than the sum of its proper divisors (1).

983856109 is an equidigital number, since it uses as much as digits as its factorization.

983856109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 49.

The square root of 983856109 is about 31366.4806600932. The cubic root of 983856109 is about 994.5894820913.

The spelling of 983856109 in words is "nine hundred eighty-three million, eight hundred fifty-six thousand, one hundred nine".