102857897 has 2 divisors, whose sum is σ = 102857898. Its totient is φ = 102857896.

The previous prime is 102857873. The next prime is 102857899. The reversal of 102857897 is 798758201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92236816 + 10621081 = 9604^2 + 3259^2 .

It is a cyclic number.

It is not a de Polignac number, because 102857897 - 2⁸ = 102857641 is a prime.

Together with 102857899, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102857899) 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, 51428948 + 51428949.

It is an arithmetic number, because the mean of its divisors is an integer number (51428949).

Almost surely, 2^102857897 is an apocalyptic number.

It is an amenable number.

102857897 is a deficient number, since it is larger than the sum of its proper divisors (1).

102857897 is an equidigital number, since it uses as much as digits as its factorization.

102857897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 102857897 is about 10141.8882364183. Note that the first 3 decimals coincide. The cubic root of 102857897 is about 468.5391444668.

The spelling of 102857897 in words is "one hundred two million, eight hundred fifty-seven thousand, eight hundred ninety-seven".