102039187 has 4 divisors (see below), whose sum is σ = 102071016. Its totient is φ = 102007360.

The previous prime is 102039173. The next prime is 102039221. The reversal of 102039187 is 781930201.

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

It is a cyclic number.

It is not a de Polignac number, because 102039187 - 2¹¹ = 102037139 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102039127) 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, 10489 + ... + 17722.

It is an arithmetic number, because the mean of its divisors is an integer number (25517754).

Almost surely, 2^102039187 is an apocalyptic number.

102039187 is a deficient number, since it is larger than the sum of its proper divisors (31829).

102039187 is an equidigital number, since it uses as much as digits as its factorization.

102039187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31828.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 102039187 is about 10101.4447976515. Note that the first 3 decimals coincide. The cubic root of 102039187 is about 467.2926999935.

Adding to 102039187 its reverse (781930201), we get a palindrome (883969388).

The spelling of 102039187 in words is "one hundred two million, thirty-nine thousand, one hundred eighty-seven".