477789121 has 2 divisors, whose sum is σ = 477789122. Its totient is φ = 477789120.

The previous prime is 477789119. The next prime is 477789163. The reversal of 477789121 is 121987774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 386319025 + 91470096 = 19655^2 + 9564^2 .

It is a cyclic number.

It is not a de Polignac number, because 477789121 - 2¹ = 477789119 is a prime.

Together with 477789119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (477786121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238894560 + 238894561.

It is an arithmetic number, because the mean of its divisors is an integer number (238894561).

Almost surely, 2^477789121 is an apocalyptic number.

It is an amenable number.

477789121 is a deficient number, since it is larger than the sum of its proper divisors (1).

477789121 is an equidigital number, since it uses as much as digits as its factorization.

477789121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 197568, while the sum is 46.

The square root of 477789121 is about 21858.3878865757. The cubic root of 477789121 is about 781.7695530216.

The spelling of 477789121 in words is "four hundred seventy-seven million, seven hundred eighty-nine thousand, one hundred twenty-one".