122810689 has 4 divisors (see below), whose sum is σ = 123090880. Its totient is φ = 122530500.

The previous prime is 122810609. The next prime is 122810693. The reversal of 122810689 is 986018221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 986018221 = 127 ⋅7763923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122810689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122810609) 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 in 3 ways as a sum of consecutive naturals, for example, 139437 + ... + 140314.

It is an arithmetic number, because the mean of its divisors is an integer number (30772720).

Almost surely, 2^122810689 is an apocalyptic number.

It is an amenable number.

122810689 is a deficient number, since it is larger than the sum of its proper divisors (280191).

122810689 is an equidigital number, since it uses as much as digits as its factorization.

122810689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280190.

The product of its (nonzero) digits is 13824, while the sum is 37.

The square root of 122810689 is about 11081.9984208625. The cubic root of 122810689 is about 497.0637088096.

The spelling of 122810689 in words is "one hundred twenty-two million, eight hundred ten thousand, six hundred eighty-nine".