102054209 has 2 divisors, whose sum is σ = 102054210. Its totient is φ = 102054208.

The previous prime is 102054191. The next prime is 102054269. The reversal of 102054209 is 902450201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53333809 + 48720400 = 7303^2 + 6980^2 .

It is a cyclic number.

It is not a de Polignac number, because 102054209 - 2²⁴ = 85276993 is a prime.

It is not a weakly prime, because it can be changed into another prime (102054269) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51027104 + 51027105.

It is an arithmetic number, because the mean of its divisors is an integer number (51027105).

Almost surely, 2^102054209 is an apocalyptic number.

It is an amenable number.

102054209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102054209 is an equidigital number, since it uses as much as digits as its factorization.

102054209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 102054209 is about 10102.1883272883. The cubic root of 102054209 is about 467.3156301595.

The spelling of 102054209 in words is "one hundred two million, fifty-four thousand, two hundred nine".