923531 has 4 divisors (see below), whose sum is σ = 1055472. Its totient is φ = 791592.

The previous prime is 923513. The next prime is 923539. The reversal of 923531 is 135329.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 923531 - 2⁶ = 923467 is a prime.

It is a super-2 number, since 2×923531² = 1705819015922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 923497 and 923506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (923539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65960 + ... + 65973.

It is an arithmetic number, because the mean of its divisors is an integer number (263868).

2⁹²³⁵³¹ is an apocalyptic number.

923531 is a deficient number, since it is larger than the sum of its proper divisors (131941).

923531 is a wasteful number, since it uses less digits than its factorization.

923531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131940.

The product of its digits is 810, while the sum is 23.

The square root of 923531 is about 961.0052028995. The cubic root of 923531 is about 97.3831517139.

The spelling of 923531 in words is "nine hundred twenty-three thousand, five hundred thirty-one".