690810053 has 4 divisors (see below), whose sum is σ = 690994668. Its totient is φ = 690625440.

The previous prime is 690810047. The next prime is 690810061. The reversal of 690810053 is 350018096.

690810053 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 412821124 + 277988929 = 20318^2 + 16673^2 .

It is a cyclic number.

It is not a de Polignac number, because 690810053 - 2⁶ = 690809989 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 (690810853) 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, 86576 + ... + 94217.

It is an arithmetic number, because the mean of its divisors is an integer number (172748667).

Almost surely, 2^690810053 is an apocalyptic number.

It is an amenable number.

690810053 is a deficient number, since it is larger than the sum of its proper divisors (184615).

690810053 is a wasteful number, since it uses less digits than its factorization.

690810053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184614.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 690810053 is about 26283.2656456537. The cubic root of 690810053 is about 884.0012579065.

It can be divided in two parts, 6908 and 10053, that added together give a palindrome (16961).

The spelling of 690810053 in words is "six hundred ninety million, eight hundred ten thousand, fifty-three".