689414785 has 4 divisors (see below), whose sum is σ = 827297748. Its totient is φ = 551531824.

The previous prime is 689414779. The next prime is 689414807. The reversal of 689414785 is 587414986.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 253064464 + 436350321 = 15908^2 + 20889^2 .

It is a cyclic number.

It is not a de Polignac number, because 689414785 - 2⁹ = 689414273 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68941474 + ... + 68941483.

It is an arithmetic number, because the mean of its divisors is an integer number (206824437).

Almost surely, 2^689414785 is an apocalyptic number.

It is an amenable number.

689414785 is a deficient number, since it is larger than the sum of its proper divisors (137882963).

689414785 is a wasteful number, since it uses less digits than its factorization.

689414785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137882962.

The product of its digits is 1935360, while the sum is 52.

The square root of 689414785 is about 26256.7093330448. The cubic root of 689414785 is about 883.4057010447.

The spelling of 689414785 in words is "six hundred eighty-nine million, four hundred fourteen thousand, seven hundred eighty-five".