102381139 has 24 divisors (see below), whose sum is σ = 126134160. Its totient is φ = 82627776.

The previous prime is 102381137. The next prime is 102381179. The reversal of 102381139 is 931183201.

It is not a de Polignac number, because 102381139 - 2¹ = 102381137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102381133) 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, 257689 + ... + 258085.

It is an arithmetic number, because the mean of its divisors is an integer number (5255590).

Almost surely, 2^102381139 is an apocalyptic number.

102381139 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

102381139 is a deficient number, since it is larger than the sum of its proper divisors (23753021).

102381139 is a wasteful number, since it uses less digits than its factorization.

102381139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 102381139 is about 10118.3565365132. The cubic root of 102381139 is about 467.8141124448.

The spelling of 102381139 in words is "one hundred two million, three hundred eighty-one thousand, one hundred thirty-nine".