684487201 has 32 divisors (see below), whose sum is σ = 765186048. Its totient is φ = 609638400.

The previous prime is 684487189. The next prime is 684487231. The reversal of 684487201 is 102784486.

It is a cyclic number.

It is not a de Polignac number, because 684487201 - 2¹⁹ = 683962913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684487231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5389600 + ... + 5389726.

It is an arithmetic number, because the mean of its divisors is an integer number (23912064).

Almost surely, 2^684487201 is an apocalyptic number.

It is an amenable number.

684487201 is a deficient number, since it is larger than the sum of its proper divisors (80698847).

684487201 is a wasteful number, since it uses less digits than its factorization.

684487201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 684487201 is about 26162.7063011455. The cubic root of 684487201 is about 881.2959559824.

The spelling of 684487201 in words is "six hundred eighty-four million, four hundred eighty-seven thousand, two hundred one".