690003305 has 4 divisors (see below), whose sum is σ = 828003972. Its totient is φ = 552002640.

The previous prime is 690003299. The next prime is 690003323. The reversal of 690003305 is 503300096.

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 502970329 + 187032976 = 22427^2 + 13676^2 .

It is not a de Polignac number, because 690003305 - 2⁸ = 690003049 is a prime.

It is a super-2 number, since 2×690003305² = 952209121821846050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69000326 + ... + 69000335.

It is an arithmetic number, because the mean of its divisors is an integer number (207000993).

Almost surely, 2^690003305 is an apocalyptic number.

It is an amenable number.

690003305 is a deficient number, since it is larger than the sum of its proper divisors (138000667).

690003305 is a wasteful number, since it uses less digits than its factorization.

690003305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138000666.

The product of its (nonzero) digits is 2430, while the sum is 26.

The square root of 690003305 is about 26267.9139826519. The cubic root of 690003305 is about 883.6570030988.

The spelling of 690003305 in words is "six hundred ninety million, three thousand, three hundred five".