623131 has 4 divisors (see below), whose sum is σ = 643264. Its totient is φ = 603000.

The previous prime is 623107. The next prime is 623171. The reversal of 623131 is 131326.

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 623131 - 2⁷ = 623003 is a prime.

It is a super-2 number, since 2×623131² = 776584486322, which contains 22 as substring.

It is a Duffinian number.

623131 is a modest number, since divided by 3131 gives 62 as remainder.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 623131.

It is not an unprimeable number, because it can be changed into a prime (623171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10020 + ... + 10081.

It is an arithmetic number, because the mean of its divisors is an integer number (160816).

2⁶²³¹³¹ is an apocalyptic number.

623131 is a deficient number, since it is larger than the sum of its proper divisors (20133).

623131 is a wasteful number, since it uses less digits than its factorization.

623131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20132.

The product of its digits is 108, while the sum is 16.

The square root of 623131 is about 789.3864706213. The cubic root of 623131 is about 85.4134870388.

Adding to 623131 its reverse (131326), we get a palindrome (754457).

The spelling of 623131 in words is "six hundred twenty-three thousand, one hundred thirty-one".