509000398 has 4 divisors (see below), whose sum is σ = 763500600. Its totient is φ = 254500198.

The previous prime is 509000339. The next prime is 509000413. The reversal of 509000398 is 893000905.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127250098 + ... + 127250101.

It is an arithmetic number, because the mean of its divisors is an integer number (190875150).

Almost surely, 2^509000398 is an apocalyptic number.

509000398 is a deficient number, since it is larger than the sum of its proper divisors (254500202).

509000398 is a wasteful number, since it uses less digits than its factorization.

509000398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254500201.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 509000398 is about 22561.0371658752. The cubic root of 509000398 is about 798.4346463744.

The spelling of 509000398 in words is "five hundred nine million, three hundred ninety-eight", and thus it is an aban number.