102171897 has 24 divisors (see below), whose sum is σ = 149617728. Its totient is φ = 67183200.

The previous prime is 102171871. The next prime is 102171907. The reversal of 102171897 is 798171201.

It is not a de Polignac number, because 102171897 - 2¹⁴ = 102155513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102171847) 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 in 23 ways as a sum of consecutive naturals, for example, 328372 + ... + 328682.

It is an arithmetic number, because the mean of its divisors is an integer number (6234072).

Almost surely, 2^102171897 is an apocalyptic number.

It is an amenable number.

102171897 is a deficient number, since it is larger than the sum of its proper divisors (47445831).

102171897 is a wasteful number, since it uses less digits than its factorization.

102171897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701 (or 698 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 36.

The square root of 102171897 is about 10108.0115255178. The cubic root of 102171897 is about 467.4951958861.

The spelling of 102171897 in words is "one hundred two million, one hundred seventy-one thousand, eight hundred ninety-seven".