623431 has 2 divisors, whose sum is σ = 623432. Its totient is φ = 623430.

The previous prime is 623423. The next prime is 623437. The reversal of 623431 is 134326.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 623431 - 2³ = 623423 is a prime.

It is a super-2 number, since 2×623431² = 777332423522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 623399 and 623408.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311715 + 311716.

It is an arithmetic number, because the mean of its divisors is an integer number (311716).

2⁶²³⁴³¹ is an apocalyptic number.

623431 is a deficient number, since it is larger than the sum of its proper divisors (1).

623431 is an equidigital number, since it uses as much as digits as its factorization.

623431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 623431 is about 789.5764687476. The cubic root of 623431 is about 85.4271919874.

Adding to 623431 its reverse (134326), we get a palindrome (757757).

The spelling of 623431 in words is "six hundred twenty-three thousand, four hundred thirty-one".