102208622809 has 4 divisors (see below), whose sum is σ = 102212196004. Its totient is φ = 102205049616.

The previous prime is 102208622797. The next prime is 102208622821. The reversal of 102208622809 is 908226802201.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908226802201 = 390199 ⋅2327599.

It is an interprime number because it is at equal distance from previous prime (102208622797) and next prime (102208622821).

It can be written as a sum of positive squares in 2 ways, for example, as 33609155584 + 68599467225 = 183328^2 + 261915^2 .

It is a cyclic number.

It is not a de Polignac number, because 102208622809 - 2²⁹ = 101671751897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102208622839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1743342 + ... + 1801015.

It is an arithmetic number, because the mean of its divisors is an integer number (25553049001).

Almost surely, 2^102208622809 is an apocalyptic number.

It is an amenable number.

102208622809 is a deficient number, since it is larger than the sum of its proper divisors (3573195).

102208622809 is an equidigital number, since it uses as much as digits as its factorization.

102208622809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3573194.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 102208622809 in words is "one hundred two billion, two hundred eight million, six hundred twenty-two thousand, eight hundred nine".