683240509 has 16 divisors (see below), whose sum is σ = 794297088. Its totient is φ = 575632512.

The previous prime is 683240497. The next prime is 683240531. The reversal of 683240509 is 905042386.

It is not a de Polignac number, because 683240509 - 2⁵ = 683240477 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 (683240539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95319 + ... + 102235.

It is an arithmetic number, because the mean of its divisors is an integer number (49643568).

Almost surely, 2^683240509 is an apocalyptic number.

It is an amenable number.

683240509 is a deficient number, since it is larger than the sum of its proper divisors (111056579).

683240509 is a wasteful number, since it uses less digits than its factorization.

683240509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 683240509 is about 26138.8696962971. The cubic root of 683240509 is about 880.7605808215.

The spelling of 683240509 in words is "six hundred eighty-three million, two hundred forty thousand, five hundred nine".