509291021423 has 8 divisors (see below), whose sum is σ = 512189700480. Its totient is φ = 506392936920.

The previous prime is 509291021377. The next prime is 509291021453. The reversal of 509291021423 is 324120192905.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 509291021423 - 2¹⁴ = 509291005039 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 (509291021453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1629758 + ... + 1916948.

It is an arithmetic number, because the mean of its divisors is an integer number (64023712560).

Almost surely, 2^509291021423 is an apocalyptic number.

509291021423 is a deficient number, since it is larger than the sum of its proper divisors (2898679057).

509291021423 is a wasteful number, since it uses less digits than its factorization.

509291021423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297277.

The product of its (nonzero) digits is 38880, while the sum is 38.

The spelling of 509291021423 in words is "five hundred nine billion, two hundred ninety-one million, twenty-one thousand, four hundred twenty-three".