239695217 has 2 divisors, whose sum is σ = 239695218. Its totient is φ = 239695216.

The previous prime is 239695177. The next prime is 239695231. The reversal of 239695217 is 712596932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239661361 + 33856 = 15481^2 + 184^2 .

It is a cyclic number.

It is not a de Polignac number, because 239695217 - 2¹⁶ = 239629681 is a prime.

It is not a weakly prime, because it can be changed into another prime (239695277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119847608 + 119847609.

It is an arithmetic number, because the mean of its divisors is an integer number (119847609).

Almost surely, 2^239695217 is an apocalyptic number.

It is an amenable number.

239695217 is a deficient number, since it is larger than the sum of its proper divisors (1).

239695217 is an equidigital number, since it uses as much as digits as its factorization.

239695217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 204120, while the sum is 44.

The square root of 239695217 is about 15482.0934307993. The cubic root of 239695217 is about 621.1833254087.

The spelling of 239695217 in words is "two hundred thirty-nine million, six hundred ninety-five thousand, two hundred seventeen".