340217172209 has 2 divisors, whose sum is σ = 340217172210. Its totient is φ = 340217172208.

The previous prime is 340217172173. The next prime is 340217172271. The reversal of 340217172209 is 902271712043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 211172416225 + 129044755984 = 459535^2 + 359228^2 .

It is a cyclic number.

It is not a de Polignac number, because 340217172209 - 2⁸ = 340217171953 is a prime.

It is not a weakly prime, because it can be changed into another prime (340217172109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170108586104 + 170108586105.

It is an arithmetic number, because the mean of its divisors is an integer number (170108586105).

Almost surely, 2^340217172209 is an apocalyptic number.

It is an amenable number.

340217172209 is a deficient number, since it is larger than the sum of its proper divisors (1).

340217172209 is an equidigital number, since it uses as much as digits as its factorization.

340217172209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 42336, while the sum is 38.

The spelling of 340217172209 in words is "three hundred forty billion, two hundred seventeen million, one hundred seventy-two thousand, two hundred nine".