102989647 has 4 divisors (see below), whose sum is σ = 103018720. Its totient is φ = 102960576.

The previous prime is 102989617. The next prime is 102989713. The reversal of 102989647 is 746989201.

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-102989647 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102989597 and 102989606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102989617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8343 + ... + 16600.

It is an arithmetic number, because the mean of its divisors is an integer number (25754680).

Almost surely, 2^102989647 is an apocalyptic number.

102989647 is a deficient number, since it is larger than the sum of its proper divisors (29073).

102989647 is an equidigital number, since it uses as much as digits as its factorization.

102989647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29072.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 102989647 is about 10148.3814965737. The cubic root of 102989647 is about 468.7391086773.

The spelling of 102989647 in words is "one hundred two million, nine hundred eighty-nine thousand, six hundred forty-seven".