122866991 has 8 divisors (see below), whose sum is σ = 134182944. Its totient is φ = 111817440.

The previous prime is 122866967. The next prime is 122866999. The reversal of 122866991 is 199668221.

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-122866991 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 (122866999) 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, 65636 + ... + 67481.

It is an arithmetic number, because the mean of its divisors is an integer number (16772868).

Almost surely, 2^122866991 is an apocalyptic number.

122866991 is a deficient number, since it is larger than the sum of its proper divisors (11315953).

122866991 is a wasteful number, since it uses less digits than its factorization.

122866991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133201.

The product of its digits is 93312, while the sum is 44.

The square root of 122866991 is about 11084.5383755933. The cubic root of 122866991 is about 497.1396560680.

The spelling of 122866991 in words is "one hundred twenty-two million, eight hundred sixty-six thousand, nine hundred ninety-one".