689897427 has 8 divisors (see below), whose sum is σ = 920003520. Its totient is φ = 459861480.

The previous prime is 689897393. The next prime is 689897491. The reversal of 689897427 is 724798986.

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

It is not a de Polignac number, because 689897427 - 2¹² = 689893331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689897827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13024 + ... + 39362.

It is an arithmetic number, because the mean of its divisors is an integer number (115000440).

Almost surely, 2^689897427 is an apocalyptic number.

689897427 is a deficient number, since it is larger than the sum of its proper divisors (230106093).

689897427 is a wasteful number, since it uses less digits than its factorization.

689897427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35073.

The product of its digits is 12192768, while the sum is 60.

The square root of 689897427 is about 26265.8985568741. The cubic root of 689897427 is about 883.6118030149.

The spelling of 689897427 in words is "six hundred eighty-nine million, eight hundred ninety-seven thousand, four hundred twenty-seven".