690845329 has 4 divisors (see below), whose sum is σ = 696285184. Its totient is φ = 685405476.

The previous prime is 690845321. The next prime is 690845333. The reversal of 690845329 is 923548096.

690845329 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690845329 - 2³ = 690845321 is a prime.

It is a super-2 number, since 2×690845329² = 954534537202236482, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690845321) 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, 2719737 + ... + 2719990.

It is an arithmetic number, because the mean of its divisors is an integer number (174071296).

Almost surely, 2^690845329 is an apocalyptic number.

It is an amenable number.

690845329 is a deficient number, since it is larger than the sum of its proper divisors (5439855).

690845329 is a wasteful number, since it uses less digits than its factorization.

690845329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5439854.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 690845329 is about 26283.9367104701. The cubic root of 690845329 is about 884.0163047333.

The spelling of 690845329 in words is "six hundred ninety million, eight hundred forty-five thousand, three hundred twenty-nine".