509397601 has 4 divisors (see below), whose sum is σ = 510558400. Its totient is φ = 508236804.

The previous prime is 509397587. The next prime is 509397649. The reversal of 509397601 is 106793905.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 106793905 = 5 ⋅21358781.

It is a cyclic number.

It is not a de Polignac number, because 509397601 - 2⁵ = 509397569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (509397671) 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, 579741 + ... + 580618.

It is an arithmetic number, because the mean of its divisors is an integer number (127639600).

Almost surely, 2^509397601 is an apocalyptic number.

It is an amenable number.

509397601 is a deficient number, since it is larger than the sum of its proper divisors (1160799).

509397601 is a wasteful number, since it uses less digits than its factorization.

509397601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160798.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 509397601 is about 22569.8383024779. The cubic root of 509397601 is about 798.6422809063.

The spelling of 509397601 in words is "five hundred nine million, three hundred ninety-seven thousand, six hundred one".