581063387 has 2 divisors, whose sum is σ = 581063388. Its totient is φ = 581063386.

The previous prime is 581063317. The next prime is 581063389. The reversal of 581063387 is 783360185.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 581063387 - 2²⁰ = 580014811 is a prime.

Together with 581063389, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (581063389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 290531693 + 290531694.

It is an arithmetic number, because the mean of its divisors is an integer number (290531694).

Almost surely, 2^581063387 is an apocalyptic number.

581063387 is a deficient number, since it is larger than the sum of its proper divisors (1).

581063387 is an equidigital number, since it uses as much as digits as its factorization.

581063387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 581063387 is about 24105.2564184661. The cubic root of 581063387 is about 834.4644453237.

The spelling of 581063387 in words is "five hundred eighty-one million, sixty-three thousand, three hundred eighty-seven".