509257994 has 8 divisors (see below), whose sum is σ = 873013728. Its totient is φ = 218253420.

The previous prime is 509257993. The next prime is 509257997. The reversal of 509257994 is 499752905.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (509257993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18187772 + ... + 18187799.

It is an arithmetic number, because the mean of its divisors is an integer number (109126716).

Almost surely, 2^509257994 is an apocalyptic number.

509257994 is a deficient number, since it is larger than the sum of its proper divisors (363755734).

509257994 is a wasteful number, since it uses less digits than its factorization.

509257994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36375580.

The product of its (nonzero) digits is 1020600, while the sum is 50.

The square root of 509257994 is about 22566.7453125168. The cubic root of 509257994 is about 798.5693148251.

The spelling of 509257994 in words is "five hundred nine million, two hundred fifty-seven thousand, nine hundred ninety-four".