461891461 has 4 divisors (see below), whose sum is σ = 474375052. Its totient is φ = 449407872.

The previous prime is 461891407. The next prime is 461891473. The reversal of 461891461 is 164198164.

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 263250625 + 198640836 = 16225^2 + 14094^2 .

It is a cyclic number.

It is not a de Polignac number, because 461891461 - 2¹⁷ = 461760389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (461891401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6241740 + ... + 6241813.

It is an arithmetic number, because the mean of its divisors is an integer number (118593763).

Almost surely, 2^461891461 is an apocalyptic number.

It is an amenable number.

461891461 is a deficient number, since it is larger than the sum of its proper divisors (12483591).

461891461 is a wasteful number, since it uses less digits than its factorization.

461891461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12483590.

The product of its digits is 41472, while the sum is 40.

The square root of 461891461 is about 21491.6602662521. The cubic root of 461891461 is about 773.0008613240. Note that the first 3 decimals are identical.

The spelling of 461891461 in words is "four hundred sixty-one million, eight hundred ninety-one thousand, four hundred sixty-one".