684525901 has 8 divisors (see below), whose sum is σ = 737311520. Its totient is φ = 633416112.

The previous prime is 684525887. The next prime is 684525913. The reversal of 684525901 is 109525486.

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 684525901 - 2⁵ = 684525869 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 (684555901) 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, 418110 + ... + 419743.

It is an arithmetic number, because the mean of its divisors is an integer number (92163940).

Almost surely, 2^684525901 is an apocalyptic number.

It is an amenable number.

684525901 is a deficient number, since it is larger than the sum of its proper divisors (52785619).

684525901 is a wasteful number, since it uses less digits than its factorization.

684525901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837915.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 684525901 is about 26163.4458930776. The cubic root of 684525901 is about 881.3125647716.

The spelling of 684525901 in words is "six hundred eighty-four million, five hundred twenty-five thousand, nine hundred one".