100857709 has 2 divisors, whose sum is σ = 100857710. Its totient is φ = 100857708.

The previous prime is 100857649. The next prime is 100857733. The reversal of 100857709 is 907758001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74046025 + 26811684 = 8605^2 + 5178^2 .

It is a cyclic number.

It is not a de Polignac number, because 100857709 - 2¹⁹ = 100333421 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100857769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50428854 + 50428855.

It is an arithmetic number, because the mean of its divisors is an integer number (50428855).

Almost surely, 2^100857709 is an apocalyptic number.

It is an amenable number.

100857709 is a deficient number, since it is larger than the sum of its proper divisors (1).

100857709 is an equidigital number, since it uses as much as digits as its factorization.

100857709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 37.

The square root of 100857709 is about 10042.7938841739. The cubic root of 100857709 is about 465.4821514506.

The spelling of 100857709 in words is "one hundred million, eight hundred fifty-seven thousand, seven hundred nine".