689812903 has 8 divisors (see below), whose sum is σ = 747435248. Its totient is φ = 632841984.

The previous prime is 689812897. The next prime is 689812909. The reversal of 689812903 is 309218986.

It is an interprime number because it is at equal distance from previous prime (689812897) and next prime (689812909).

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-689812903 is a prime.

It is a super-2 number, since 2×689812903² = 951683682290574818, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (689812909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160650 + ... + 164887.

It is an arithmetic number, because the mean of its divisors is an integer number (93429406).

Almost surely, 2^689812903 is an apocalyptic number.

689812903 is a deficient number, since it is larger than the sum of its proper divisors (57622345).

689812903 is a wasteful number, since it uses less digits than its factorization.

689812903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325713.

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 689812903 is about 26264.2895011458. The cubic root of 689812903 is about 883.5757157882.

The spelling of 689812903 in words is "six hundred eighty-nine million, eight hundred twelve thousand, nine hundred three".