509895397 has 4 divisors (see below), whose sum is σ = 556249536. Its totient is φ = 463541260.

The previous prime is 509895389. The next prime is 509895403. The reversal of 509895397 is 793598905.

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.

It is a cyclic number.

It is not a de Polignac number, because 509895397 - 2³ = 509895389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509895367) 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, 23177053 + ... + 23177074.

It is an arithmetic number, because the mean of its divisors is an integer number (139062384).

Almost surely, 2^509895397 is an apocalyptic number.

It is an amenable number.

509895397 is a deficient number, since it is larger than the sum of its proper divisors (46354139).

509895397 is a wasteful number, since it uses less digits than its factorization.

509895397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46354138.

The product of its (nonzero) digits is 3061800, while the sum is 55.

The square root of 509895397 is about 22580.8635131609. The cubic root of 509895397 is about 798.9023472410.

The spelling of 509895397 in words is "five hundred nine million, eight hundred ninety-five thousand, three hundred ninety-seven".