122989647 has 32 divisors (see below), whose sum is σ = 184135680. Its totient is φ = 72381920.

The previous prime is 122989621. The next prime is 122989673. The reversal of 122989647 is 746989221.

It is an interprime number because it is at equal distance from previous prime (122989621) and next prime (122989673).

It is a cyclic number.

It is not a de Polignac number, because 122989647 - 2¹⁶ = 122924111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 122989596 and 122989605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122989687) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 277408 + ... + 277850.

It is an arithmetic number, because the mean of its divisors is an integer number (5754240).

Almost surely, 2^122989647 is an apocalyptic number.

122989647 is a deficient number, since it is larger than the sum of its proper divisors (61146033).

122989647 is a wasteful number, since it uses less digits than its factorization.

122989647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683.

The product of its digits is 435456, while the sum is 48.

The square root of 122989647 is about 11090.0697473010. The cubic root of 122989647 is about 497.3050297011.

It can be divided in two parts, 12298 and 9647, that added together give a triangular number (21945 = T₂₀₉).

The spelling of 122989647 in words is "one hundred twenty-two million, nine hundred eighty-nine thousand, six hundred forty-seven".