102685663 has 4 divisors (see below), whose sum is σ = 103126608. Its totient is φ = 102244720.

The previous prime is 102685643. The next prime is 102685679. The reversal of 102685663 is 366586201.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102685663 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 (102685603) 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, 220123 + ... + 220588.

It is an arithmetic number, because the mean of its divisors is an integer number (25781652).

Almost surely, 2^102685663 is an apocalyptic number.

102685663 is a deficient number, since it is larger than the sum of its proper divisors (440945).

102685663 is an equidigital number, since it uses as much as digits as its factorization.

102685663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440944.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 102685663 is about 10133.3934592514. The cubic root of 102685663 is about 468.2774777790.

It can be divided in two parts, 10268 and 5663, that added together give a triangular number (15931 = T₁₇₈).

The spelling of 102685663 in words is "one hundred two million, six hundred eighty-five thousand, six hundred sixty-three".