690005 has 8 divisors (see below), whose sum is σ = 842400. Its totient is φ = 542416.

The previous prime is 689987. The next prime is 690037. The reversal of 690005 is 500096.

690005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 690005 - 2¹⁶ = 624469 is a prime.

It is a super-2 number, since 2×690005² = 952213800050, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875 + ... + 1464.

It is an arithmetic number, because the mean of its divisors is an integer number (105300).

2⁶⁹⁰⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

690005 is a deficient number, since it is larger than the sum of its proper divisors (152395).

690005 is a wasteful number, since it uses less digits than its factorization.

690005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 690005 is about 830.6653959327. The cubic root of 690005 is about 88.3657726669.

The spelling of 690005 in words is "six hundred ninety thousand, five".