102159209 has 2 divisors, whose sum is σ = 102159210. Its totient is φ = 102159208.

The previous prime is 102159179. The next prime is 102159227. The reversal of 102159209 is 902951201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 101445184 + 714025 = 10072^2 + 845^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102159209 is a prime.

It is not a weakly prime, because it can be changed into another prime (102159709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51079604 + 51079605.

It is an arithmetic number, because the mean of its divisors is an integer number (51079605).

Almost surely, 2^102159209 is an apocalyptic number.

It is an amenable number.

102159209 is a deficient number, since it is larger than the sum of its proper divisors (1).

102159209 is an equidigital number, since it uses as much as digits as its factorization.

102159209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 29.

The square root of 102159209 is about 10107.3838850615. The cubic root of 102159209 is about 467.4758434524.

The spelling of 102159209 in words is "one hundred two million, one hundred fifty-nine thousand, two hundred nine".