122777863 has 8 divisors (see below), whose sum is σ = 132335168. Its totient is φ = 113236704.

The previous prime is 122777843. The next prime is 122777917. The reversal of 122777863 is 368777221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122777863 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 (122777813) 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 7 ways as a sum of consecutive naturals, for example, 15181 + ... + 21817.

It is an arithmetic number, because the mean of its divisors is an integer number (16541896).

Almost surely, 2^122777863 is an apocalyptic number.

122777863 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

122777863 is a deficient number, since it is larger than the sum of its proper divisors (9557305).

122777863 is a wasteful number, since it uses less digits than its factorization.

122777863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8073.

The product of its digits is 197568, while the sum is 43.

The square root of 122777863 is about 11080.5172713191. The cubic root of 122777863 is about 497.0194182368.

The spelling of 122777863 in words is "one hundred twenty-two million, seven hundred seventy-seven thousand, eight hundred sixty-three".