689202691 has 4 divisors (see below), whose sum is σ = 689270400. Its totient is φ = 689134984.

The previous prime is 689202677. The next prime is 689202721. The reversal of 689202691 is 196202986.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 689202691 - 2¹⁷ = 689071619 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689202611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15136 + ... + 40093.

It is an arithmetic number, because the mean of its divisors is an integer number (172317600).

Almost surely, 2^689202691 is an apocalyptic number.

689202691 is a deficient number, since it is larger than the sum of its proper divisors (67709).

689202691 is a wasteful number, since it uses less digits than its factorization.

689202691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67708.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 689202691 is about 26252.6701689561. The cubic root of 689202691 is about 883.3151004029.

The spelling of 689202691 in words is "six hundred eighty-nine million, two hundred two thousand, six hundred ninety-one".