802534509 has 24 divisors (see below), whose sum is σ = 1344599360. Its totient is φ = 451744128.

The previous prime is 802534493. The next prime is 802534511. The reversal of 802534509 is 905435208.

It is not a de Polignac number, because 802534509 - 2⁴ = 802534493 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 (802534529) 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 23 ways as a sum of consecutive naturals, for example, 90844 + ... + 99285.

Almost surely, 2^802534509 is an apocalyptic number.

It is an amenable number.

802534509 is a deficient number, since it is larger than the sum of its proper divisors (542064851).

802534509 is a wasteful number, since it uses less digits than its factorization.

802534509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190209 (or 190206 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 802534509 is about 28329.0400296233. The cubic root of 802534509 is about 929.2970789741.

The spelling of 802534509 in words is "eight hundred two million, five hundred thirty-four thousand, five hundred nine".