487451813 has 2 divisors, whose sum is σ = 487451814. Its totient is φ = 487451812.

The previous prime is 487451803. The next prime is 487451819. The reversal of 487451813 is 318154784.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267878689 + 219573124 = 16367^2 + 14818^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-487451813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (487451819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 243725906 + 243725907.

It is an arithmetic number, because the mean of its divisors is an integer number (243725907).

Almost surely, 2^487451813 is an apocalyptic number.

It is an amenable number.

487451813 is a deficient number, since it is larger than the sum of its proper divisors (1).

487451813 is an equidigital number, since it uses as much as digits as its factorization.

487451813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 487451813 is about 22078.3109181839. The cubic root of 487451813 is about 787.0045260858.

The spelling of 487451813 in words is "four hundred eighty-seven million, four hundred fifty-one thousand, eight hundred thirteen".