684734589 has 48 divisors (see below), whose sum is σ = 1254090240. Its totient is φ = 349656480.

The previous prime is 684734549. The next prime is 684734591. The reversal of 684734589 is 985437486.

It is not a de Polignac number, because 684734589 - 2⁹ = 684734077 is a prime.

It is a super-2 number, since 2×684734589² = 937722914745997842, which contains 22 as substring.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684734539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32514 + ... + 49260.

It is an arithmetic number, because the mean of its divisors is an integer number (26126880).

Almost surely, 2^684734589 is an apocalyptic number.

It is an amenable number.

684734589 is a deficient number, since it is larger than the sum of its proper divisors (569355651).

684734589 is a wasteful number, since it uses less digits than its factorization.

684734589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16830 (or 16827 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 54.

The square root of 684734589 is about 26167.4337488413. The cubic root of 684734589 is about 881.4021161283.

The spelling of 684734589 in words is "six hundred eighty-four million, seven hundred thirty-four thousand, five hundred eighty-nine".