461959681 has 4 divisors (see below), whose sum is σ = 464304852. Its totient is φ = 459614512.

The previous prime is 461959661. The next prime is 461959697. The reversal of 461959681 is 186959164.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 337971456 + 123988225 = 18384^2 + 11135^2 .

It is a cyclic number.

It is not a de Polignac number, because 461959681 - 2¹¹ = 461957633 is a prime.

It is a super-2 number, since 2×461959681² = 426813493739243522, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (461959601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1172290 + ... + 1172683.

It is an arithmetic number, because the mean of its divisors is an integer number (116076213).

Almost surely, 2^461959681 is an apocalyptic number.

It is an amenable number.

461959681 is a deficient number, since it is larger than the sum of its proper divisors (2345171).

461959681 is a wasteful number, since it uses less digits than its factorization.

461959681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345170.

The product of its digits is 466560, while the sum is 49.

The square root of 461959681 is about 21493.2473349189. The cubic root of 461959681 is about 773.0389160961.

The spelling of 461959681 in words is "four hundred sixty-one million, nine hundred fifty-nine thousand, six hundred eighty-one".