122779559 has 8 divisors (see below), whose sum is σ = 148573728. Its totient is φ = 99048960.

The previous prime is 122779541. The next prime is 122779567. The reversal of 122779559 is 955977221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 122779559 - 2⁸ = 122779303 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 (122779529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 515762 + ... + 515999.

It is an arithmetic number, because the mean of its divisors is an integer number (18571716).

Almost surely, 2^122779559 is an apocalyptic number.

122779559 is a deficient number, since it is larger than the sum of its proper divisors (25794169).

122779559 is a wasteful number, since it uses less digits than its factorization.

122779559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031785.

The product of its digits is 396900, while the sum is 47.

The square root of 122779559 is about 11080.5938017780. The cubic root of 122779559 is about 497.0217067630.

The spelling of 122779559 in words is "one hundred twenty-two million, seven hundred seventy-nine thousand, five hundred fifty-nine".