102171691 has 8 divisors (see below), whose sum is σ = 106020224. Its totient is φ = 98357760.

The previous prime is 102171679. The next prime is 102171697. The reversal of 102171691 is 196171201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102171691 - 2⁵ = 102171659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102171697) 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 in 7 ways as a sum of consecutive naturals, for example, 2556 + ... + 14521.

It is an arithmetic number, because the mean of its divisors is an integer number (13252528).

Almost surely, 2^102171691 is an apocalyptic number.

102171691 is a deficient number, since it is larger than the sum of its proper divisors (3848533).

102171691 is a wasteful number, since it uses less digits than its factorization.

102171691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17301.

The product of its (nonzero) digits is 756, while the sum is 28.

The square root of 102171691 is about 10108.0013355757. The cubic root of 102171691 is about 467.4948816964.

The spelling of 102171691 in words is "one hundred two million, one hundred seventy-one thousand, six hundred ninety-one".