623461689 has 24 divisors (see below), whose sum is σ = 955054152. Its totient is φ = 390566400.

The previous prime is 623461679. The next prime is 623461693. The reversal of 623461689 is 986164326.

623461689 is a `hidden beast` number, since 6 + 23 + 4 + 616 + 8 + 9 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 347636025 + 275825664 = 18645^2 + 16608^2 .

It is not a de Polignac number, because 623461689 - 2⁷ = 623461561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (623461609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104347 + ... + 110159.

It is an arithmetic number, because the mean of its divisors is an integer number (39793923).

Almost surely, 2^623461689 is an apocalyptic number.

It is an amenable number.

623461689 is a deficient number, since it is larger than the sum of its proper divisors (331592463).

623461689 is a wasteful number, since it uses less digits than its factorization.

623461689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6537 (or 6534 counting only the distinct ones).

The product of its digits is 373248, while the sum is 45.

The square root of 623461689 is about 24969.2148254606. The cubic root of 623461689 is about 854.2859371006.

The spelling of 623461689 in words is "six hundred twenty-three million, four hundred sixty-one thousand, six hundred eighty-nine".