689501 has 4 divisors (see below), whose sum is σ = 692604. Its totient is φ = 686400.

The previous prime is 689467. The next prime is 689509. The reversal of 689501 is 105986.

689501 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 454276 + 235225 = 674^2 + 485^2 .

It is a cyclic number.

It is not a de Polignac number, because 689501 - 2¹⁰ = 688477 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689509) 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, 1190 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (173151).

2⁶⁸⁹⁵⁰¹ is an apocalyptic number.

It is an amenable number.

689501 is a deficient number, since it is larger than the sum of its proper divisors (3103).

689501 is a wasteful number, since it uses less digits than its factorization.

689501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3102.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 689501 is about 830.3619692640. The cubic root of 689501 is about 88.3442524376.

The spelling of 689501 in words is "six hundred eighty-nine thousand, five hundred one".