689404313 has 8 divisors (see below), whose sum is σ = 762501768. Its totient is φ = 619173504.

The previous prime is 689404297. The next prime is 689404357. The reversal of 689404313 is 313404986.

It can be written as a sum of positive squares in 4 ways, for example, as 83850649 + 605553664 = 9157^2 + 24608^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 689404313 - 2⁴ = 689404297 is a prime.

It is a super-4 number, since 4×689404313⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (689404363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 716156 + ... + 717117.

It is an arithmetic number, because the mean of its divisors is an integer number (95312721).

Almost surely, 2^689404313 is an apocalyptic number.

It is an amenable number.

689404313 is a deficient number, since it is larger than the sum of its proper divisors (73097455).

689404313 is a wasteful number, since it uses less digits than its factorization.

689404313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433323.

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 689404313 is about 26256.5099165902. The cubic root of 689404313 is about 883.4012281344.

The spelling of 689404313 in words is "six hundred eighty-nine million, four hundred four thousand, three hundred thirteen".