690590 has 16 divisors (see below), whose sum is σ = 1267488. Its totient is φ = 270816.

The previous prime is 690589. The next prime is 690607. The reversal of 690590 is 95096.

690590 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 122 + ... + 1181.

It is an arithmetic number, because the mean of its divisors is an integer number (79218).

2⁶⁹⁰⁵⁹⁰ is an apocalyptic number.

690590 is a deficient number, since it is larger than the sum of its proper divisors (576898).

690590 is a wasteful number, since it uses less digits than its factorization.

690590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363.

The product of its (nonzero) digits is 2430, while the sum is 29.

The square root of 690590 is about 831.0174486736. The cubic root of 690590 is about 88.3907383675.

Subtracting from 690590 its sum of digits (29), we obtain a square (690561 = 831²).

The spelling of 690590 in words is "six hundred ninety thousand, five hundred ninety".