689312527 has 2 divisors, whose sum is σ = 689312528. Its totient is φ = 689312526.

The previous prime is 689312509. The next prime is 689312557. The reversal of 689312527 is 725213986.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-689312527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689312557) 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 as a sum of consecutive naturals, namely, 344656263 + 344656264.

It is an arithmetic number, because the mean of its divisors is an integer number (344656264).

Almost surely, 2^689312527 is an apocalyptic number.

689312527 is a deficient number, since it is larger than the sum of its proper divisors (1).

689312527 is an equidigital number, since it uses as much as digits as its factorization.

689312527 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 181440, while the sum is 43.

The square root of 689312527 is about 26254.7619871139. The cubic root of 689312527 is about 883.3620215990.

The spelling of 689312527 in words is "six hundred eighty-nine million, three hundred twelve thousand, five hundred twenty-seven".