689503158187 has 2 divisors, whose sum is σ = 689503158188. Its totient is φ = 689503158186.

The previous prime is 689503158173. The next prime is 689503158257. The reversal of 689503158187 is 781851305986.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689503158187 is a prime.

It is not a weakly prime, because it can be changed into another prime (689503152187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344751579093 + 344751579094.

It is an arithmetic number, because the mean of its divisors is an integer number (344751579094).

Almost surely, 2^689503158187 is an apocalyptic number.

689503158187 is a deficient number, since it is larger than the sum of its proper divisors (1).

689503158187 is an equidigital number, since it uses as much as digits as its factorization.

689503158187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14515200, while the sum is 61.

The spelling of 689503158187 in words is "six hundred eighty-nine billion, five hundred three million, one hundred fifty-eight thousand, one hundred eighty-seven".