102171387 has 4 divisors (see below), whose sum is σ = 136228520. Its totient is φ = 68114256.

The previous prime is 102171353. The next prime is 102171389. The reversal of 102171387 is 783171201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102171387 - 2¹⁶ = 102105851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102171389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17028562 + ... + 17028567.

It is an arithmetic number, because the mean of its divisors is an integer number (34057130).

Almost surely, 2^102171387 is an apocalyptic number.

102171387 is a deficient number, since it is larger than the sum of its proper divisors (34057133).

102171387 is an equidigital number, since it uses as much as digits as its factorization.

102171387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34057132.

The product of its (nonzero) digits is 2352, while the sum is 30.

The square root of 102171387 is about 10107.9862979725. The cubic root of 102171387 is about 467.4944180370.

The spelling of 102171387 in words is "one hundred two million, one hundred seventy-one thousand, three hundred eighty-seven".