103209857 has 2 divisors, whose sum is σ = 103209858. Its totient is φ = 103209856.

The previous prime is 103209853. The next prime is 103209877. The reversal of 103209857 is 758902301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52287361 + 50922496 = 7231^2 + 7136^2 .

It is a cyclic number.

It is not a de Polignac number, because 103209857 - 2² = 103209853 is a prime.

It is not a weakly prime, because it can be changed into another prime (103209853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51604928 + 51604929.

It is an arithmetic number, because the mean of its divisors is an integer number (51604929).

Almost surely, 2^103209857 is an apocalyptic number.

It is an amenable number.

103209857 is a deficient number, since it is larger than the sum of its proper divisors (1).

103209857 is an equidigital number, since it uses as much as digits as its factorization.

103209857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 103209857 is about 10159.2252165212. The cubic root of 103209857 is about 469.0729531013.

The spelling of 103209857 in words is "one hundred three million, two hundred nine thousand, eight hundred fifty-seven".