461819887 has 2 divisors, whose sum is σ = 461819888. Its totient is φ = 461819886.

The previous prime is 461819851. The next prime is 461819993. The reversal of 461819887 is 788918164.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 461819887 - 2¹⁹ = 461295599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (461819087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 230909943 + 230909944.

It is an arithmetic number, because the mean of its divisors is an integer number (230909944).

Almost surely, 2^461819887 is an apocalyptic number.

461819887 is a deficient number, since it is larger than the sum of its proper divisors (1).

461819887 is an equidigital number, since it uses as much as digits as its factorization.

461819887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 52.

The square root of 461819887 is about 21489.9950442060. The cubic root of 461819887 is about 772.9609315813.

The spelling of 461819887 in words is "four hundred sixty-one million, eight hundred nineteen thousand, eight hundred eighty-seven".