461891407 has 2 divisors, whose sum is σ = 461891408. Its totient is φ = 461891406.

The previous prime is 461891401. The next prime is 461891473. The reversal of 461891407 is 704198164.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 461891407 - 2⁷ = 461891279 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 461891407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461891401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230945703 + 230945704.

It is an arithmetic number, because the mean of its divisors is an integer number (230945704).

Almost surely, 2^461891407 is an apocalyptic number.

461891407 is a deficient number, since it is larger than the sum of its proper divisors (1).

461891407 is an equidigital number, since it uses as much as digits as its factorization.

461891407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 461891407 is about 21491.6590099508. The cubic root of 461891407 is about 773.0008312000. Note that the first 3 decimals are identical.

The spelling of 461891407 in words is "four hundred sixty-one million, eight hundred ninety-one thousand, four hundred seven".