102857857 has 2 divisors, whose sum is σ = 102857858. Its totient is φ = 102857856.

The previous prime is 102857831. The next prime is 102857873. The reversal of 102857857 is 758758201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 36288576 = 8159^2 + 6024^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102857857 is a prime.

It is equal to p_5916598 and since 102857857 and 5916598 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (102857897) 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, 51428928 + 51428929.

It is an arithmetic number, because the mean of its divisors is an integer number (51428929).

Almost surely, 2^102857857 is an apocalyptic number.

It is an amenable number.

102857857 is a deficient number, since it is larger than the sum of its proper divisors (1).

102857857 is an equidigital number, since it uses as much as digits as its factorization.

102857857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156800, while the sum is 43.

The square root of 102857857 is about 10141.8862643987. The cubic root of 102857857 is about 468.5390837307.

It can be divided in two parts, 1028 and 57857, that added together give a palindrome (58885).

The spelling of 102857857 in words is "one hundred two million, eight hundred fifty-seven thousand, eight hundred fifty-seven".