509390997 has 8 divisors (see below), whose sum is σ = 679692480. Its totient is φ = 339341760.

The previous prime is 509390989. The next prime is 509391019. The reversal of 509390997 is 799093905.

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

It is not a de Polignac number, because 509390997 - 2³ = 509390989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509390957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58297 + ... + 66462.

It is an arithmetic number, because the mean of its divisors is an integer number (84961560).

Almost surely, 2^509390997 is an apocalyptic number.

It is an amenable number.

509390997 is a deficient number, since it is larger than the sum of its proper divisors (170301483).

509390997 is a wasteful number, since it uses less digits than its factorization.

509390997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126123.

The product of its (nonzero) digits is 688905, while the sum is 51.

The square root of 509390997 is about 22569.6920005569. The cubic root of 509390997 is about 798.6388296033.

The spelling of 509390997 in words is "five hundred nine million, three hundred ninety thousand, nine hundred ninety-seven".