509419069 has 2 divisors, whose sum is σ = 509419070. Its totient is φ = 509419068.

The previous prime is 509419067. The next prime is 509419073. The reversal of 509419069 is 960914905.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 418693444 + 90725625 = 20462^2 + 9525^2 .

It is a cyclic number.

It is not a de Polignac number, because 509419069 - 2¹ = 509419067 is a prime.

It is a super-2 number, since 2×509419069² = 519015575721653522, which contains 22 as substring.

Together with 509419067, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (509419067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254709534 + 254709535.

It is an arithmetic number, because the mean of its divisors is an integer number (254709535).

Almost surely, 2^509419069 is an apocalyptic number.

It is an amenable number.

509419069 is a deficient number, since it is larger than the sum of its proper divisors (1).

509419069 is an equidigital number, since it uses as much as digits as its factorization.

509419069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 509419069 is about 22570.3138879370. The cubic root of 509419069 is about 798.6535000480.

The spelling of 509419069 in words is "five hundred nine million, four hundred nineteen thousand, sixty-nine".