102939 has 4 divisors (see below), whose sum is σ = 137256. Its totient is φ = 68624.

The previous prime is 102931. The next prime is 102953. The reversal of 102939 is 939201.

It is a happy number.

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 102939 - 2³ = 102931 is a prime.

It is a D-number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 102939.

It is not an unprimeable number, because it can be changed into a prime (102931) 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, 17154 + ... + 17159.

It is an arithmetic number, because the mean of its divisors is an integer number (34314).

2¹⁰²⁹³⁹ is an apocalyptic number.

102939 is a deficient number, since it is larger than the sum of its proper divisors (34317).

102939 is an equidigital number, since it uses as much as digits as its factorization.

102939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34316.

The product of its (nonzero) digits is 486, while the sum is 24.

The square root of 102939 is about 320.8410821575. The cubic root of 102939 is about 46.8662259133.

The spelling of 102939 in words is "one hundred two thousand, nine hundred thirty-nine".