623463581 has 16 divisors (see below), whose sum is σ = 682616256. Its totient is φ = 565958016.

The previous prime is 623463571. The next prime is 623463613. The reversal of 623463581 is 185364326.

It is not a de Polignac number, because 623463581 - 2¹⁰ = 623462557 is a prime.

It is a super-2 number, since 2×623463581² = 777413673666687122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623463521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419666 + ... + 421148.

It is an arithmetic number, because the mean of its divisors is an integer number (42663516).

Almost surely, 2^623463581 is an apocalyptic number.

It is an amenable number.

623463581 is a deficient number, since it is larger than the sum of its proper divisors (59152675).

623463581 is a wasteful number, since it uses less digits than its factorization.

623463581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2012.

The product of its digits is 103680, while the sum is 38.

The square root of 623463581 is about 24969.2527120857. The cubic root of 623463581 is about 854.2868012582.

It can be divided in two parts, 62 and 3463581, that added together give a palindrome (3463643).

The spelling of 623463581 in words is "six hundred twenty-three million, four hundred sixty-three thousand, five hundred eighty-one".