509429924 has 6 divisors (see below), whose sum is σ = 891502374. Its totient is φ = 254714960.

The previous prime is 509429923. The next prime is 509429929. The reversal of 509429924 is 429924905.

It can be written as a sum of positive squares in only one way, i.e., 259789924 + 249640000 = 16118^2 + 15800^2 .

It is not an unprimeable number, because it can be changed into a prime (509429923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63678737 + ... + 63678744.

It is an arithmetic number, because the mean of its divisors is an integer number (148583729).

Almost surely, 2^509429924 is an apocalyptic number.

It is an amenable number.

509429924 is a deficient number, since it is larger than the sum of its proper divisors (382072450).

509429924 is a wasteful number, since it uses less digits than its factorization.

509429924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127357485 (or 127357483 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 44.

The square root of 509429924 is about 22570.5543573923. The cubic root of 509429924 is about 798.6591727333.

The spelling of 509429924 in words is "five hundred nine million, four hundred twenty-nine thousand, nine hundred twenty-four".