689078545 has 8 divisors (see below), whose sum is σ = 828780480. Its totient is φ = 550005360.

The previous prime is 689078521. The next prime is 689078587. The reversal of 689078545 is 545870986.

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

It is not a de Polignac number, because 689078545 - 2¹¹ = 689076497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 689078492 and 689078501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154771 + ... + 159160.

It is an arithmetic number, because the mean of its divisors is an integer number (103597560).

Almost surely, 2^689078545 is an apocalyptic number.

It is an amenable number.

689078545 is a deficient number, since it is larger than the sum of its proper divisors (139701935).

689078545 is a wasteful number, since it uses less digits than its factorization.

689078545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314375.

The product of its (nonzero) digits is 2419200, while the sum is 52.

The square root of 689078545 is about 26250.3056172685. The cubic root of 689078545 is about 883.2620600695.

The spelling of 689078545 in words is "six hundred eighty-nine million, seventy-eight thousand, five hundred forty-five".