477109681 has 2 divisors, whose sum is σ = 477109682. Its totient is φ = 477109680.

The previous prime is 477109679. The next prime is 477109693. The reversal of 477109681 is 186901774.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 376709281 + 100400400 = 19409^2 + 10020^2 .

It is a cyclic number.

It is not a de Polignac number, because 477109681 - 2¹ = 477109679 is a prime.

It is a super-2 number, since 2×477109681² = 455267295407843522, which contains 22 as substring.

Together with 477109679, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (477109601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 238554840 + 238554841.

It is an arithmetic number, because the mean of its divisors is an integer number (238554841).

Almost surely, 2^477109681 is an apocalyptic number.

It is an amenable number.

477109681 is a deficient number, since it is larger than the sum of its proper divisors (1).

477109681 is an equidigital number, since it uses as much as digits as its factorization.

477109681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 477109681 is about 21842.8404975177. The cubic root of 477109681 is about 781.3988054386.

The spelling of 477109681 in words is "four hundred seventy-seven million, one hundred nine thousand, six hundred eighty-one".