511109 has 2 divisors, whose sum is σ = 511110. Its totient is φ = 511108.

The previous prime is 511087. The next prime is 511111. The reversal of 511109 is 901115.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 494209 + 16900 = 703^2 + 130^2 .

It is a cyclic number.

It is not a de Polignac number, because 511109 - 2¹⁶ = 445573 is a prime.

It is a super-2 number, since 2×511109² = 522464819762, which contains 22 as substring.

Together with 511111, 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 (511169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 255554 + 255555.

It is an arithmetic number, because the mean of its divisors is an integer number (255555).

2⁵¹¹¹⁰⁹ is an apocalyptic number.

It is an amenable number.

511109 is a deficient number, since it is larger than the sum of its proper divisors (1).

511109 is an equidigital number, since it uses as much as digits as its factorization.

511109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45, while the sum is 17.

The square root of 511109 is about 714.9188765168. The cubic root of 511109 is about 79.9535668047.

The spelling of 511109 in words is "five hundred eleven thousand, one hundred nine".