623461 has 4 divisors (see below), whose sum is σ = 650592. Its totient is φ = 596332.

The previous prime is 623437. The next prime is 623477. The reversal of 623461 is 164326.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 164326 = 2 ⋅82163.

It is a cyclic number.

It is not a de Polignac number, because 623461 - 2¹³ = 615269 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

623461 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623401) 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, 13531 + ... + 13576.

It is an arithmetic number, because the mean of its divisors is an integer number (162648).

2⁶²³⁴⁶¹ is an apocalyptic number.

It is an amenable number.

623461 is a deficient number, since it is larger than the sum of its proper divisors (27131).

623461 is a wasteful number, since it uses less digits than its factorization.

623461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27130.

The product of its digits is 864, while the sum is 22.

The square root of 623461 is about 789.5954660457. The cubic root of 623461 is about 85.4285622404.

Adding to 623461 its reverse (164326), we get a palindrome (787787).

The spelling of 623461 in words is "six hundred twenty-three thousand, four hundred sixty-one".