684275089 has 4 divisors (see below), whose sum is σ = 684777024. Its totient is φ = 683773156.

The previous prime is 684275083. The next prime is 684275107. The reversal of 684275089 is 980572486.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 980572486 = 2 ⋅490286243.

It is a cyclic number.

It is not a de Polignac number, because 684275089 - 2¹³ = 684266897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684275083) 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 3 ways as a sum of consecutive naturals, for example, 248917 + ... + 251650.

It is an arithmetic number, because the mean of its divisors is an integer number (171194256).

Almost surely, 2^684275089 is an apocalyptic number.

It is an amenable number.

684275089 is a deficient number, since it is larger than the sum of its proper divisors (501935).

684275089 is a wasteful number, since it uses less digits than its factorization.

684275089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501934.

The product of its (nonzero) digits is 967680, while the sum is 49.

The square root of 684275089 is about 26158.6522779749. The cubic root of 684275089 is about 881.2049132475.

The spelling of 684275089 in words is "six hundred eighty-four million, two hundred seventy-five thousand, eighty-nine".