690320893973 has 4 divisors (see below), whose sum is σ = 690459824460. Its totient is φ = 690181963488.

The previous prime is 690320893963. The next prime is 690320894017. The reversal of 690320893973 is 379398023096.

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 164205679729 + 526115214244 = 405223^2 + 725338^2 .

It is a cyclic number.

It is not a de Polignac number, because 690320893973 - 2¹⁶ = 690320828437 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 (690320893943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69457790 + ... + 69467727.

It is an arithmetic number, because the mean of its divisors is an integer number (172614956115).

Almost surely, 2^690320893973 is an apocalyptic number.

It is an amenable number.

690320893973 is a deficient number, since it is larger than the sum of its proper divisors (138930487).

690320893973 is a wasteful number, since it uses less digits than its factorization.

690320893973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138930486.

The product of its (nonzero) digits is 13226976, while the sum is 59.

The spelling of 690320893973 in words is "six hundred ninety billion, three hundred twenty million, eight hundred ninety-three thousand, nine hundred seventy-three".