689591741 has 8 divisors (see below), whose sum is σ = 697685304. Its totient is φ = 681523200.

The previous prime is 689591717. The next prime is 689591759. The reversal of 689591741 is 147195986.

It can be written as a sum of positive squares in 4 ways, for example, as 643636900 + 45954841 = 25370^2 + 6779^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689591741 is a prime.

It is a super-2 number, since 2×689591741² = 951073538510822162, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 689591741.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689591701) 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, 52361 + ... + 64193.

It is an arithmetic number, because the mean of its divisors is an integer number (87210663).

Almost surely, 2^689591741 is an apocalyptic number.

It is an amenable number.

689591741 is a deficient number, since it is larger than the sum of its proper divisors (8093563).

689591741 is a wasteful number, since it uses less digits than its factorization.

689591741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12511.

The product of its digits is 544320, while the sum is 50.

The square root of 689591741 is about 26260.0788460355. The cubic root of 689591741 is about 883.4812774948.

The spelling of 689591741 in words is "six hundred eighty-nine million, five hundred ninety-one thousand, seven hundred forty-one".