461570981 has 2 divisors, whose sum is σ = 461570982. Its totient is φ = 461570980.

The previous prime is 461570953. The next prime is 461571001. The reversal of 461570981 is 189075164.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 298114756 + 163456225 = 17266^2 + 12785^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-461570981 is a prime.

It is a super-2 number, since 2×461570981² = 426095541002604722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461570951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230785490 + 230785491.

It is an arithmetic number, because the mean of its divisors is an integer number (230785491).

Almost surely, 2^461570981 is an apocalyptic number.

It is an amenable number.

461570981 is a deficient number, since it is larger than the sum of its proper divisors (1).

461570981 is an equidigital number, since it uses as much as digits as its factorization.

461570981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 461570981 is about 21484.2030571301. The cubic root of 461570981 is about 772.8220396350.

The spelling of 461570981 in words is "four hundred sixty-one million, five hundred seventy thousand, nine hundred eighty-one".