509223643 has 2 divisors, whose sum is σ = 509223644. Its totient is φ = 509223642.

The previous prime is 509223623. The next prime is 509223647. The reversal of 509223643 is 346322905.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-509223643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 509223599 and 509223608.

It is not a weakly prime, because it can be changed into another prime (509223647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 254611821 + 254611822.

It is an arithmetic number, because the mean of its divisors is an integer number (254611822).

Almost surely, 2^509223643 is an apocalyptic number.

509223643 is a deficient number, since it is larger than the sum of its proper divisors (1).

509223643 is an equidigital number, since it uses as much as digits as its factorization.

509223643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 509223643 is about 22565.9842018911. The cubic root of 509223643 is about 798.5513591120.

The spelling of 509223643 in words is "five hundred nine million, two hundred twenty-three thousand, six hundred forty-three".