684611601 has 8 divisors (see below), whose sum is σ = 927779904. Its totient is φ = 448925520.

The previous prime is 684611597. The next prime is 684611621. The reversal of 684611601 is 106116486.

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

It is not a de Polignac number, because 684611601 - 2² = 684611597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684611621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1870341 + ... + 1870706.

It is an arithmetic number, because the mean of its divisors is an integer number (115972488).

Almost surely, 2^684611601 is an apocalyptic number.

684611601 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

684611601 is a deficient number, since it is larger than the sum of its proper divisors (243168303).

684611601 is a wasteful number, since it uses less digits than its factorization.

684611601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741111.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 684611601 is about 26165.0836230271. The cubic root of 684611601 is about 881.3493422137.

The spelling of 684611601 in words is "six hundred eighty-four million, six hundred eleven thousand, six hundred one".