121569673 has 2 divisors, whose sum is σ = 121569674. Its totient is φ = 121569672.

The previous prime is 121569671. The next prime is 121569709. The reversal of 121569673 is 376965121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119530489 + 2039184 = 10933^2 + 1428^2 .

It is a cyclic number.

It is not a de Polignac number, because 121569673 - 2¹ = 121569671 is a prime.

Together with 121569671, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (121569671) 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 as a sum of consecutive naturals, namely, 60784836 + 60784837.

It is an arithmetic number, because the mean of its divisors is an integer number (60784837).

Almost surely, 2^121569673 is an apocalyptic number.

It is an amenable number.

121569673 is a deficient number, since it is larger than the sum of its proper divisors (1).

121569673 is an equidigital number, since it uses as much as digits as its factorization.

121569673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 68040, while the sum is 40.

The square root of 121569673 is about 11025.8638210346. The cubic root of 121569673 is about 495.3837421560.

The spelling of 121569673 in words is "one hundred twenty-one million, five hundred sixty-nine thousand, six hundred seventy-three".