623547613 has 4 divisors (see below), whose sum is σ = 671512828. Its totient is φ = 575582400.

The previous prime is 623547611. The next prime is 623547679. The reversal of 623547613 is 316745326.

623547613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 181791289 + 441756324 = 13483^2 + 21018^2 .

It is a cyclic number.

It is not a de Polignac number, because 623547613 - 2¹ = 623547611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623547611) 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, 23982588 + ... + 23982613.

It is an arithmetic number, because the mean of its divisors is an integer number (167878207).

Almost surely, 2^623547613 is an apocalyptic number.

It is an amenable number.

623547613 is a deficient number, since it is larger than the sum of its proper divisors (47965215).

623547613 is a wasteful number, since it uses less digits than its factorization.

623547613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47965214.

The product of its digits is 90720, while the sum is 37.

The square root of 623547613 is about 24970.9353649398. The cubic root of 623547613 is about 854.3251805133.

The spelling of 623547613 in words is "six hundred twenty-three million, five hundred forty-seven thousand, six hundred thirteen".