463840813 has 2 divisors, whose sum is σ = 463840814. Its totient is φ = 463840812.

The previous prime is 463840807. The next prime is 463840823. The reversal of 463840813 is 318048364.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341030089 + 122810724 = 18467^2 + 11082^2 .

It is a cyclic number.

It is not a de Polignac number, because 463840813 - 2⁵ = 463840781 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (463840823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 231920406 + 231920407.

It is an arithmetic number, because the mean of its divisors is an integer number (231920407).

Almost surely, 2^463840813 is an apocalyptic number.

It is an amenable number.

463840813 is a deficient number, since it is larger than the sum of its proper divisors (1).

463840813 is an equidigital number, since it uses as much as digits as its factorization.

463840813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 463840813 is about 21536.9638760899. The cubic root of 463840813 is about 774.0867844876.

It can be divided in two parts, 4638 and 40813, that added together give a triangular number (45451 = T₃₀₁).

The spelling of 463840813 in words is "four hundred sixty-three million, eight hundred forty thousand, eight hundred thirteen".