689435513 has 8 divisors (see below), whose sum is σ = 747200328. Its totient is φ = 632346624.

The previous prime is 689435491. The next prime is 689435519. The reversal of 689435513 is 315534986.

It can be written as a sum of positive squares in 4 ways, for example, as 62283664 + 627151849 = 7892^2 + 25043^2 .

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

It is not a de Polignac number, because 689435513 - 2²⁴ = 672658297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (689435519) 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, 166856 + ... + 170937.

It is an arithmetic number, because the mean of its divisors is an integer number (93400041).

Almost surely, 2^689435513 is an apocalyptic number.

It is an amenable number.

689435513 is a deficient number, since it is larger than the sum of its proper divisors (57764815).

689435513 is a wasteful number, since it uses less digits than its factorization.

689435513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337963.

The product of its digits is 388800, while the sum is 44.

The square root of 689435513 is about 26257.1040482381. The cubic root of 689435513 is about 883.4145544714.

The spelling of 689435513 in words is "six hundred eighty-nine million, four hundred thirty-five thousand, five hundred thirteen".