122942991 has 8 divisors (see below), whose sum is σ = 164334384. Its totient is φ = 81756800.

The previous prime is 122942959. The next prime is 122943011. The reversal of 122942991 is 199249221.

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 122942991 - 2⁵ = 122942959 is a prime.

It is a super-2 number, since 2×122942991² = 30229958072052162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122946991) 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, 49896 + ... + 52301.

It is an arithmetic number, because the mean of its divisors is an integer number (20541798).

Almost surely, 2^122942991 is an apocalyptic number.

122942991 is a deficient number, since it is larger than the sum of its proper divisors (41391393).

122942991 is a wasteful number, since it uses less digits than its factorization.

122942991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102601.

The product of its digits is 23328, while the sum is 39.

The square root of 122942991 is about 11087.9660443203. The cubic root of 122942991 is about 497.2421376920.

The spelling of 122942991 in words is "one hundred twenty-two million, nine hundred forty-two thousand, nine hundred ninety-one".