689452613 has 4 divisors (see below), whose sum is σ = 690291168. Its totient is φ = 688614060.

The previous prime is 689452609. The next prime is 689452633. The reversal of 689452613 is 316254986.

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 689452613 - 2² = 689452609 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 (689452633) 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, 418043 + ... + 419688.

It is an arithmetic number, because the mean of its divisors is an integer number (172572792).

Almost surely, 2^689452613 is an apocalyptic number.

It is an amenable number.

689452613 is a deficient number, since it is larger than the sum of its proper divisors (838555).

689452613 is an equidigital number, since it uses as much as digits as its factorization.

689452613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838554.

The product of its digits is 311040, while the sum is 44.

The square root of 689452613 is about 26257.4296723803. The cubic root of 689452613 is about 883.4218581586.

The spelling of 689452613 in words is "six hundred eighty-nine million, four hundred fifty-two thousand, six hundred thirteen".