523690 has 8 divisors (see below), whose sum is σ = 942660. Its totient is φ = 209472.

The previous prime is 523681. The next prime is 523717. The reversal of 523690 is 96325.

It can be written as a sum of positive squares in 2 ways, for example, as 522729 + 961 = 723^2 + 31^2 .

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

It is a super-2 number, since 2×523690² = 548502432200, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26175 + ... + 26194.

2⁵²³⁶⁹⁰ is an apocalyptic number.

523690 is a deficient number, since it is larger than the sum of its proper divisors (418970).

523690 is a wasteful number, since it uses less digits than its factorization.

523690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52376.

The product of its (nonzero) digits is 1620, while the sum is 25.

The square root of 523690 is about 723.6642868071. The cubic root of 523690 is about 80.6042782714.

The spelling of 523690 in words is "five hundred twenty-three thousand, six hundred ninety".