461777081 has 2 divisors, whose sum is σ = 461777082. Its totient is φ = 461777080.

The previous prime is 461777077. The next prime is 461777089. The reversal of 461777081 is 180777164.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325261225 + 136515856 = 18035^2 + 11684^2 .

It is a cyclic number.

It is not a de Polignac number, because 461777081 - 2² = 461777077 is a prime.

It is a super-2 number, since 2×461777081² = 426476145073761122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (461777089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230888540 + 230888541.

It is an arithmetic number, because the mean of its divisors is an integer number (230888541).

Almost surely, 2^461777081 is an apocalyptic number.

It is an amenable number.

461777081 is a deficient number, since it is larger than the sum of its proper divisors (1).

461777081 is an equidigital number, since it uses as much as digits as its factorization.

461777081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 65856, while the sum is 41.

The square root of 461777081 is about 21488.9990692912. Note that the first 3 decimals coincide. The cubic root of 461777081 is about 772.9370489747.

The spelling of 461777081 in words is "four hundred sixty-one million, seven hundred seventy-seven thousand, eighty-one".