122690787 has 4 divisors (see below), whose sum is σ = 163587720. Its totient is φ = 81793856.

The previous prime is 122690773. The next prime is 122690791. The reversal of 122690787 is 787096221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 122690787 - 2⁸ = 122690531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122690987) 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, 20448462 + ... + 20448467.

It is an arithmetic number, because the mean of its divisors is an integer number (40896930).

Almost surely, 2^122690787 is an apocalyptic number.

122690787 is a deficient number, since it is larger than the sum of its proper divisors (40896933).

122690787 is an equidigital number, since it uses as much as digits as its factorization.

122690787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40896932.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 122690787 is about 11076.5873354567. The cubic root of 122690787 is about 496.9018924411.

The spelling of 122690787 in words is "one hundred twenty-two million, six hundred ninety thousand, seven hundred eighty-seven".