689432597 has 6 divisors (see below), whose sum is σ = 801993078. Its totient is φ = 590942184.

The previous prime is 689432593. The next prime is 689432599. The reversal of 689432597 is 795234986.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 434263921 + 255168676 = 20839^2 + 15974^2 .

It is not a de Polignac number, because 689432597 - 2² = 689432593 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 (689432593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7034978 + ... + 7035075.

It is an arithmetic number, because the mean of its divisors is an integer number (133665513).

Almost surely, 2^689432597 is an apocalyptic number.

It is an amenable number.

689432597 is a deficient number, since it is larger than the sum of its proper divisors (112560481).

689432597 is a wasteful number, since it uses less digits than its factorization.

689432597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14070067 (or 14070060 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 53.

The square root of 689432597 is about 26257.0485203497. The cubic root of 689432597 is about 883.4133089885.

The spelling of 689432597 in words is "six hundred eighty-nine million, four hundred thirty-two thousand, five hundred ninety-seven".