243690013 has 8 divisors (see below), whose sum is σ = 280696832. Its totient is φ = 207231696.

The previous prime is 243689993. The next prime is 243690061. The reversal of 243690013 is 310096342.

243690013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 243690013 - 2²¹ = 241592861 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 (243690413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136170 + ... + 137947.

It is an arithmetic number, because the mean of its divisors is an integer number (35087104).

Almost surely, 2^243690013 is an apocalyptic number.

It is an amenable number.

243690013 is a deficient number, since it is larger than the sum of its proper divisors (37006819).

243690013 is a wasteful number, since it uses less digits than its factorization.

243690013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274251.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 243690013 is about 15610.5737562717. The cubic root of 243690013 is about 624.6152409454.

The spelling of 243690013 in words is "two hundred forty-three million, six hundred ninety thousand, thirteen".