102808655 has 4 divisors (see below), whose sum is σ = 123370392. Its totient is φ = 82246920.

The previous prime is 102808637. The next prime is 102808661. The reversal of 102808655 is 556808201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 102808655 - 2²⁶ = 35699791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 10280861 + ... + 10280870.

It is an arithmetic number, because the mean of its divisors is an integer number (30842598).

Almost surely, 2^102808655 is an apocalyptic number.

102808655 is a deficient number, since it is larger than the sum of its proper divisors (20561737).

102808655 is an equidigital number, since it uses as much as digits as its factorization.

102808655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20561736.

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 102808655 is about 10139.4602913567. The cubic root of 102808655 is about 468.4643633433.

The spelling of 102808655 in words is "one hundred two million, eight hundred eight thousand, six hundred fifty-five".