122773991 has 8 divisors (see below), whose sum is σ = 129795120. Its totient is φ = 115808832.

The previous prime is 122773961. The next prime is 122773993. The reversal of 122773991 is 199377221.

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-122773991 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 (122773993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9440 + ... + 18293.

It is an arithmetic number, because the mean of its divisors is an integer number (16224390).

Almost surely, 2^122773991 is an apocalyptic number.

122773991 is a deficient number, since it is larger than the sum of its proper divisors (7021129).

122773991 is a wasteful number, since it uses less digits than its factorization.

122773991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27985.

The product of its digits is 47628, while the sum is 41.

The square root of 122773991 is about 11080.3425488565. The cubic root of 122773991 is about 497.0141934095.

The spelling of 122773991 in words is "one hundred twenty-two million, seven hundred seventy-three thousand, nine hundred ninety-one".