102897109685 has 8 divisors (see below), whose sum is σ = 123915951576. Its totient is φ = 82024741120.

The previous prime is 102897109673. The next prime is 102897109687. The reversal of 102897109685 is 586901798201.

It can be written as a sum of positive squares in 4 ways, for example, as 22962553156 + 79934556529 = 151534^2 + 282727^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102897109685 - 2⁶ = 102897109621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102897109685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102897109687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36616784 + ... + 36619593.

It is an arithmetic number, because the mean of its divisors is an integer number (15489493947).

Almost surely, 2^102897109685 is an apocalyptic number.

It is an amenable number.

102897109685 is a deficient number, since it is larger than the sum of its proper divisors (21018841891).

102897109685 is an equidigital number, since it uses as much as digits as its factorization.

102897109685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73236663.

The product of its (nonzero) digits is 2177280, while the sum is 56.

The spelling of 102897109685 in words is "one hundred two billion, eight hundred ninety-seven million, one hundred nine thousand, six hundred eighty-five".