122438687 has 4 divisors (see below), whose sum is σ = 139929936. Its totient is φ = 104947440.

The previous prime is 122438677. The next prime is 122438689. The reversal of 122438687 is 786834221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 786834221 = 97 ⋅8111693.

It is a cyclic number.

It is not a de Polignac number, because 122438687 - 2⁴ = 122438671 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122438689) 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, 8745614 + ... + 8745627.

It is an arithmetic number, because the mean of its divisors is an integer number (34982484).

Almost surely, 2^122438687 is an apocalyptic number.

122438687 is a deficient number, since it is larger than the sum of its proper divisors (17491249).

122438687 is an equidigital number, since it uses as much as digits as its factorization.

122438687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17491248.

The product of its digits is 129024, while the sum is 41.

The square root of 122438687 is about 11065.2016249140. The cubic root of 122438687 is about 496.5613211904.

The spelling of 122438687 in words is "one hundred twenty-two million, four hundred thirty-eight thousand, six hundred eighty-seven".