102137839 has 4 divisors (see below), whose sum is σ = 105432640. Its totient is φ = 98843040.

The previous prime is 102137809. The next prime is 102137843. The reversal of 102137839 is 938731201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938731201 = 197 ⋅4765133.

It is a cyclic number.

It is not a de Polignac number, because 102137839 - 2⁵ = 102137807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102137809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647354 + ... + 1647415.

It is an arithmetic number, because the mean of its divisors is an integer number (26358160).

Almost surely, 2^102137839 is an apocalyptic number.

102137839 is a deficient number, since it is larger than the sum of its proper divisors (3294801).

102137839 is an equidigital number, since it uses as much as digits as its factorization.

102137839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3294800.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 102137839 is about 10106.3266818365. The cubic root of 102137839 is about 467.4432451334.

The spelling of 102137839 in words is "one hundred two million, one hundred thirty-seven thousand, eight hundred thirty-nine".