689238466643 has 2 divisors, whose sum is σ = 689238466644. Its totient is φ = 689238466642.

The previous prime is 689238466597. The next prime is 689238466667. The reversal of 689238466643 is 346664832986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689238466643 - 2²⁴ = 689221689427 is a prime.

It is a super-3 number, since 3×689238466643³ (a number of 36 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 689238466643.

It is not a weakly prime, because it can be changed into another prime (689238466843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344619233321 + 344619233322.

It is an arithmetic number, because the mean of its divisors is an integer number (344619233322).

Almost surely, 2^689238466643 is an apocalyptic number.

689238466643 is a deficient number, since it is larger than the sum of its proper divisors (1).

689238466643 is an equidigital number, since it uses as much as digits as its factorization.

689238466643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 214990848, while the sum is 65.

The spelling of 689238466643 in words is "six hundred eighty-nine billion, two hundred thirty-eight million, four hundred sixty-six thousand, six hundred forty-three".