102193909 has 2 divisors, whose sum is σ = 102193910. Its totient is φ = 102193908.

The previous prime is 102193901. The next prime is 102193937. The reversal of 102193909 is 909391201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53333809 + 48860100 = 7303^2 + 6990^2 .

It is a cyclic number.

It is not a de Polignac number, because 102193909 - 2³ = 102193901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102193901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51096954 + 51096955.

It is an arithmetic number, because the mean of its divisors is an integer number (51096955).

Almost surely, 2^102193909 is an apocalyptic number.

It is an amenable number.

102193909 is a deficient number, since it is larger than the sum of its proper divisors (1).

102193909 is an equidigital number, since it uses as much as digits as its factorization.

102193909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4374, while the sum is 34.

The square root of 102193909 is about 10109.1003061598. The cubic root of 102193909 is about 467.5287659957.

The spelling of 102193909 in words is "one hundred two million, one hundred ninety-three thousand, nine hundred nine".