205103069 has 2 divisors, whose sum is σ = 205103070. Its totient is φ = 205103068.

The previous prime is 205103047. The next prime is 205103071. The reversal of 205103069 is 960301502.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121837444 + 83265625 = 11038^2 + 9125^2 .

It is a cyclic number.

It is not a de Polignac number, because 205103069 - 2⁸ = 205102813 is a prime.

It is a super-2 number, since 2×205103069² = 84134537826437522, which contains 22 as substring.

Together with 205103071, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (205103009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102551534 + 102551535.

It is an arithmetic number, because the mean of its divisors is an integer number (102551535).

Almost surely, 2^205103069 is an apocalyptic number.

It is an amenable number.

205103069 is a deficient number, since it is larger than the sum of its proper divisors (1).

205103069 is an equidigital number, since it uses as much as digits as its factorization.

205103069 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 26.

The square root of 205103069 is about 14321.4199365845. The cubic root of 205103069 is about 589.7356557834.

The spelling of 205103069 in words is "two hundred five million, one hundred three thousand, sixty-nine".