684065501 has 8 divisors (see below), whose sum is σ = 788708544. Its totient is φ = 581152320.

The previous prime is 684065497. The next prime is 684065507. The reversal of 684065501 is 105560486.

It is a happy number.

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

It is not a de Polignac number, because 684065501 - 2² = 684065497 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 (684065507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 431615 + ... + 433196.

It is an arithmetic number, because the mean of its divisors is an integer number (98588568).

Almost surely, 2^684065501 is an apocalyptic number.

It is an amenable number.

684065501 is a deficient number, since it is larger than the sum of its proper divisors (104643043).

684065501 is a wasteful number, since it uses less digits than its factorization.

684065501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864931.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 684065501 is about 26154.6458779315. The cubic root of 684065501 is about 881.1149353824.

The spelling of 684065501 in words is "six hundred eighty-four million, sixty-five thousand, five hundred one".