689085401 has 4 divisors (see below), whose sum is σ = 705892404. Its totient is φ = 672278400.

The previous prime is 689085389. The next prime is 689085427. The reversal of 689085401 is 104580986.

689085401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 182790400 + 506295001 = 13520^2 + 22501^2 .

It is a cyclic number.

It is not a de Polignac number, because 689085401 - 2⁶ = 689085337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41), and also a Moran number because the ratio is a prime number: 16806961 = 689085401 / (6 + 8 + 9 + 0 + 8 + 5 + 4 + 0 + 1).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (689085431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8403440 + ... + 8403521.

It is an arithmetic number, because the mean of its divisors is an integer number (176473101).

Almost surely, 2^689085401 is an apocalyptic number.

It is an amenable number.

689085401 is a deficient number, since it is larger than the sum of its proper divisors (16807003).

689085401 is a wasteful number, since it uses less digits than its factorization.

689085401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16807002.

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 689085401 is about 26250.4362058995. The cubic root of 689085401 is about 883.2649894040.

The spelling of 689085401 in words is "six hundred eighty-nine million, eighty-five thousand, four hundred one".