689047385 has 16 divisors (see below), whose sum is σ = 919188480. Its totient is φ = 492419520.

The previous prime is 689047379. The next prime is 689047397. The reversal of 689047385 is 583740986.

It is not a de Polignac number, because 689047385 - 2²⁴ = 672270169 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 168965 + ... + 172994.

It is an arithmetic number, because the mean of its divisors is an integer number (57449280).

Almost surely, 2^689047385 is an apocalyptic number.

689047385 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

689047385 is a deficient number, since it is larger than the sum of its proper divisors (230141095).

689047385 is a wasteful number, since it uses less digits than its factorization.

689047385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342008.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The square root of 689047385 is about 26249.7120936592. The cubic root of 689047385 is about 883.2487462217.

The spelling of 689047385 in words is "six hundred eighty-nine million, forty-seven thousand, three hundred eighty-five".