102459939 has 4 divisors (see below), whose sum is σ = 136613256. Its totient is φ = 68306624.

The previous prime is 102459899. The next prime is 102459941. The reversal of 102459939 is 939954201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939954201 = 3 ⋅313318067.

It is a cyclic number.

It is not a de Polignac number, because 102459939 - 2⁷ = 102459811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102459939.

It is not an unprimeable number, because it can be changed into a prime (102459949) 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 3 ways as a sum of consecutive naturals, for example, 17076654 + ... + 17076659.

It is an arithmetic number, because the mean of its divisors is an integer number (34153314).

Almost surely, 2^102459939 is an apocalyptic number.

102459939 is a deficient number, since it is larger than the sum of its proper divisors (34153317).

102459939 is an equidigital number, since it uses as much as digits as its factorization.

102459939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34153316.

The product of its (nonzero) digits is 87480, while the sum is 42.

The square root of 102459939 is about 10122.2497005359. The cubic root of 102459939 is about 467.9341029652.

The spelling of 102459939 in words is "one hundred two million, four hundred fifty-nine thousand, nine hundred thirty-nine".