121749673 has 2 divisors, whose sum is σ = 121749674. Its totient is φ = 121749672.

The previous prime is 121749659. The next prime is 121749709. The reversal of 121749673 is 376947121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71453209 + 50296464 = 8453^2 + 7092^2 .

It is a cyclic number.

It is not a de Polignac number, because 121749673 - 2¹³ = 121741481 is a prime.

It is not a weakly prime, because it can be changed into another prime (121749613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60874836 + 60874837.

It is an arithmetic number, because the mean of its divisors is an integer number (60874837).

Almost surely, 2^121749673 is an apocalyptic number.

It is an amenable number.

121749673 is a deficient number, since it is larger than the sum of its proper divisors (1).

121749673 is an equidigital number, since it uses as much as digits as its factorization.

121749673 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 63504, while the sum is 40.

The square root of 121749673 is about 11034.0234275626. The cubic root of 121749673 is about 495.6281153308.

The spelling of 121749673 in words is "one hundred twenty-one million, seven hundred forty-nine thousand, six hundred seventy-three".