689454403 has 4 divisors (see below), whose sum is σ = 752132088. Its totient is φ = 626776720.

The previous prime is 689454383. The next prime is 689454407. The reversal of 689454403 is 304454986.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 689454403 - 2¹⁷ = 689323331 is a prime.

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 689454403.

It is not an unprimeable number, because it can be changed into a prime (689454407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31338826 + ... + 31338847.

It is an arithmetic number, because the mean of its divisors is an integer number (188033022).

Almost surely, 2^689454403 is an apocalyptic number.

689454403 is a deficient number, since it is larger than the sum of its proper divisors (62677685).

689454403 is a wasteful number, since it uses less digits than its factorization.

689454403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62677684.

The product of its (nonzero) digits is 414720, while the sum is 43.

The square root of 689454403 is about 26257.4637579489. The cubic root of 689454403 is about 883.4226226896.

The spelling of 689454403 in words is "six hundred eighty-nine million, four hundred fifty-four thousand, four hundred three".