102085920439 has 16 divisors (see below), whose sum is σ = 111349849600. Its totient is φ = 93268034496.

The previous prime is 102085920421. The next prime is 102085920451. The reversal of 102085920439 is 934029580201.

It is a cyclic number.

It is not a de Polignac number, because 102085920439 - 2⁵ = 102085920407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a junction number, because it is equal to n+sod(n) for n = 102085920395 and 102085920404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102085930439) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 726294 + ... + 855379.

It is an arithmetic number, because the mean of its divisors is an integer number (6959365600).

Almost surely, 2^102085920439 is an apocalyptic number.

102085920439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

102085920439 is a deficient number, since it is larger than the sum of its proper divisors (9263929161).

102085920439 is a wasteful number, since it uses less digits than its factorization.

102085920439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581814.

The product of its (nonzero) digits is 155520, while the sum is 43.

The spelling of 102085920439 in words is "one hundred two billion, eighty-five million, nine hundred twenty thousand, four hundred thirty-nine".