690135 has 16 divisors (see below), whose sum is σ = 1115520. Its totient is φ = 364320.

The previous prime is 690127. The next prime is 690139. The reversal of 690135 is 531096.

It is not a de Polignac number, because 690135 - 2³ = 690127 is a prime.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690139) 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, 1920 + ... + 2250.

It is an arithmetic number, because the mean of its divisors is an integer number (69720).

2⁶⁹⁰¹³⁵ is an apocalyptic number.

690135 is a deficient number, since it is larger than the sum of its proper divisors (425385).

690135 is a wasteful number, since it uses less digits than its factorization.

690135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478.

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 690135 is about 830.7436427683. The cubic root of 690135 is about 88.3713218195.

The spelling of 690135 in words is "six hundred ninety thousand, one hundred thirty-five".