122989649 has 8 divisors (see below), whose sum is σ = 126053760. Its totient is φ = 119963376.

The previous prime is 122989621. The next prime is 122989673. The reversal of 122989649 is 946989221.

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 122989649 - 2⁸ = 122989393 is a prime.

It is a super-2 number, since 2×122989649² = 30252907522286402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 122989597 and 122989606.

It is not an unprimeable number, because it can be changed into a prime (122989049) 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, 2822 + ... + 15935.

It is an arithmetic number, because the mean of its divisors is an integer number (15756720).

Almost surely, 2^122989649 is an apocalyptic number.

It is an amenable number.

122989649 is a deficient number, since it is larger than the sum of its proper divisors (3064111).

122989649 is an equidigital number, since it uses as much as digits as its factorization.

122989649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18919.

The product of its digits is 559872, while the sum is 50.

The square root of 122989649 is about 11090.0698374717. The cubic root of 122989649 is about 497.3050323968.

The spelling of 122989649 in words is "one hundred twenty-two million, nine hundred eighty-nine thousand, six hundred forty-nine".