121620673 has 2 divisors, whose sum is σ = 121620674. Its totient is φ = 121620672.

The previous prime is 121620643. The next prime is 121620683. The reversal of 121620673 is 376026121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119749249 + 1871424 = 10943^2 + 1368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121620673 is a prime.

It is not a weakly prime, because it can be changed into another prime (121620643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60810336 + 60810337.

It is an arithmetic number, because the mean of its divisors is an integer number (60810337).

Almost surely, 2^121620673 is an apocalyptic number.

It is an amenable number.

121620673 is a deficient number, since it is larger than the sum of its proper divisors (1).

121620673 is an equidigital number, since it uses as much as digits as its factorization.

121620673 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 121620673 is about 11028.1763224932. The cubic root of 121620673 is about 495.4530056987.

Adding to 121620673 its reverse (376026121), we get a palindrome (497646794).

The spelling of 121620673 in words is "one hundred twenty-one million, six hundred twenty thousand, six hundred seventy-three".