690810243 has 4 divisors (see below), whose sum is σ = 921080328. Its totient is φ = 460540160.

The previous prime is 690810203. The next prime is 690810287. The reversal of 690810243 is 342018096.

690810243 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 is a cyclic number.

It is not a de Polignac number, because 690810243 - 2¹⁰ = 690809219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690810203) 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, 115135038 + ... + 115135043.

It is an arithmetic number, because the mean of its divisors is an integer number (230270082).

Almost surely, 2^690810243 is an apocalyptic number.

690810243 is a deficient number, since it is larger than the sum of its proper divisors (230270085).

690810243 is a wasteful number, since it uses less digits than its factorization.

690810243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230270084.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 690810243 is about 26283.2692601206. The cubic root of 690810243 is about 884.0013389516.

The spelling of 690810243 in words is "six hundred ninety million, eight hundred ten thousand, two hundred forty-three".