689597981503 has 4 divisors (see below), whose sum is σ = 697346273520. Its totient is φ = 681849689488.

The previous prime is 689597981453. The next prime is 689597981521. The reversal of 689597981503 is 305189795986.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689597981503 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 (689597981573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3874145875 + ... + 3874146052.

It is an arithmetic number, because the mean of its divisors is an integer number (174336568380).

Almost surely, 2^689597981503 is an apocalyptic number.

689597981503 is a deficient number, since it is larger than the sum of its proper divisors (7748292017).

689597981503 is an equidigital number, since it uses as much as digits as its factorization.

689597981503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7748292016.

The product of its (nonzero) digits is 146966400, while the sum is 70.

The spelling of 689597981503 in words is "six hundred eighty-nine billion, five hundred ninety-seven million, nine hundred eighty-one thousand, five hundred three".