102805673213 has 4 divisors (see below), whose sum is σ = 102905388768. Its totient is φ = 102705957660.

The previous prime is 102805673153. The next prime is 102805673219. The reversal of 102805673213 is 312376508201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312376508201 = 2053 ⋅152156117.

It is a cyclic number.

It is not a de Polignac number, because 102805673213 - 2⁶ = 102805673149 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 (102805673219) 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, 49856231 + ... + 49858292.

It is an arithmetic number, because the mean of its divisors is an integer number (25726347192).

Almost surely, 2^102805673213 is an apocalyptic number.

It is an amenable number.

102805673213 is a deficient number, since it is larger than the sum of its proper divisors (99715555).

102805673213 is an equidigital number, since it uses as much as digits as its factorization.

102805673213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99715554.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 102805673213 in words is "one hundred two billion, eight hundred five million, six hundred seventy-three thousand, two hundred thirteen".