102194409 has 4 divisors (see below), whose sum is σ = 136259216. Its totient is φ = 68129604.

The previous prime is 102194381. The next prime is 102194419. The reversal of 102194409 is 904491201.

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.

It is a de Polignac number, because none of the positive numbers 2^k-102194409 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102194419) 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, 17032399 + ... + 17032404.

It is an arithmetic number, because the mean of its divisors is an integer number (34064804).

Almost surely, 2^102194409 is an apocalyptic number.

It is an amenable number.

102194409 is a deficient number, since it is larger than the sum of its proper divisors (34064807).

102194409 is an equidigital number, since it uses as much as digits as its factorization.

102194409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34064806.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 102194409 is about 10109.1250363224. The cubic root of 102194409 is about 467.5295284808.

The spelling of 102194409 in words is "one hundred two million, one hundred ninety-four thousand, four hundred nine".