689696621111 has 2 divisors, whose sum is σ = 689696621112. Its totient is φ = 689696621110.

The previous prime is 689696621023. The next prime is 689696621147. The reversal of 689696621111 is 111126696986.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 689696621111 - 2²² = 689692426807 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (689696621311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 344848310555 + 344848310556.

It is an arithmetic number, because the mean of its divisors is an integer number (344848310556).

Almost surely, 2^689696621111 is an apocalyptic number.

689696621111 is a deficient number, since it is larger than the sum of its proper divisors (1).

689696621111 is an equidigital number, since it uses as much as digits as its factorization.

689696621111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 56.

The spelling of 689696621111 in words is "six hundred eighty-nine billion, six hundred ninety-six million, six hundred twenty-one thousand, one hundred eleven".