689507461 has 4 divisors (see below), whose sum is σ = 700810924. Its totient is φ = 678204000.

The previous prime is 689507459. The next prime is 689507491. The reversal of 689507461 is 164705986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 164705986 = 2 ⋅82352993.

It can be written as a sum of positive squares in 2 ways, for example, as 79121025 + 610386436 = 8895^2 + 24706^2 .

It is a cyclic number.

It is not a de Polignac number, because 689507461 - 2¹ = 689507459 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 (689507431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5651640 + ... + 5651761.

It is an arithmetic number, because the mean of its divisors is an integer number (175202731).

Almost surely, 2^689507461 is an apocalyptic number.

689507461 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

689507461 is a deficient number, since it is larger than the sum of its proper divisors (11303463).

689507461 is a wasteful number, since it uses less digits than its factorization.

689507461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11303462.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 689507461 is about 26258.4740798090. The cubic root of 689507461 is about 883.4452838137.

The spelling of 689507461 in words is "six hundred eighty-nine million, five hundred seven thousand, four hundred sixty-one".