509408747 has 2 divisors, whose sum is σ = 509408748. Its totient is φ = 509408746.

The previous prime is 509408687. The next prime is 509408749. The reversal of 509408747 is 747804905.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 509408747 - 2¹⁴ = 509392363 is a prime.

It is a super-2 number, since 2×509408747² = 518994543040220018, which contains 22 as substring.

Together with 509408749, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 509408698 and 509408707.

It is not a weakly prime, because it can be changed into another prime (509408749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254704373 + 254704374.

It is an arithmetic number, because the mean of its divisors is an integer number (254704374).

Almost surely, 2^509408747 is an apocalyptic number.

509408747 is a deficient number, since it is larger than the sum of its proper divisors (1).

509408747 is an equidigital number, since it uses as much as digits as its factorization.

509408747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 509408747 is about 22570.0852235874. The cubic root of 509408747 is about 798.6481058270.

The spelling of 509408747 in words is "five hundred nine million, four hundred eight thousand, seven hundred forty-seven".