684563065 has 16 divisors (see below), whose sum is σ = 867038400. Its totient is φ = 517430592.

The previous prime is 684563063. The next prime is 684563069. The reversal of 684563065 is 560365486.

It is a cyclic number.

It is not a de Polignac number, because 684563065 - 2¹ = 684563063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684563063) 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, 26499 + ... + 45511.

It is an arithmetic number, because the mean of its divisors is an integer number (54189900).

Almost surely, 2^684563065 is an apocalyptic number.

It is an amenable number.

684563065 is a deficient number, since it is larger than the sum of its proper divisors (182475335).

684563065 is a wasteful number, since it uses less digits than its factorization.

684563065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19416.

The product of its (nonzero) digits is 518400, while the sum is 43.

The square root of 684563065 is about 26164.1561109851. The cubic root of 684563065 is about 881.3285137699.

The spelling of 684563065 in words is "six hundred eighty-four million, five hundred sixty-three thousand, sixty-five".