461089721 has 2 divisors, whose sum is σ = 461089722. Its totient is φ = 461089720.

The previous prime is 461089669. The next prime is 461089723. The reversal of 461089721 is 127980164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 319122496 + 141967225 = 17864^2 + 11915^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-461089721 is a prime.

It is a super-4 number, since 4×461089721⁴ (a number of 36 digits) contains 4444 as substring.

Together with 461089723, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (461089723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230544860 + 230544861.

It is an arithmetic number, because the mean of its divisors is an integer number (230544861).

Almost surely, 2^461089721 is an apocalyptic number.

It is an amenable number.

461089721 is a deficient number, since it is larger than the sum of its proper divisors (1).

461089721 is an equidigital number, since it uses as much as digits as its factorization.

461089721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 461089721 is about 21472.9998137196. Note that the first 3 decimals coincide. The cubic root of 461089721 is about 772.5533502463.

The spelling of 461089721 in words is "four hundred sixty-one million, eighty-nine thousand, seven hundred twenty-one".