689079811 has 16 divisors (see below), whose sum is σ = 814213120. Its totient is φ = 570680640.

The previous prime is 689079767. The next prime is 689079841. The reversal of 689079811 is 118970986.

It is a cyclic number.

It is not a de Polignac number, because 689079811 - 2¹³ = 689071619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (689079841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158215 + ... + 162511.

It is an arithmetic number, because the mean of its divisors is an integer number (50888320).

Almost surely, 2^689079811 is an apocalyptic number.

689079811 is a deficient number, since it is larger than the sum of its proper divisors (125133309).

689079811 is a wasteful number, since it uses less digits than its factorization.

689079811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5074.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 689079811 is about 26250.3297312624. The cubic root of 689079811 is about 883.2626009895.

The spelling of 689079811 in words is "six hundred eighty-nine million, seventy-nine thousand, eight hundred eleven".