531808087 has 2 divisors, whose sum is σ = 531808088. Its totient is φ = 531808086.

The previous prime is 531808063. The next prime is 531808091. The reversal of 531808087 is 780808135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531808087 - 2²⁷ = 397590359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531808687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265904043 + 265904044.

It is an arithmetic number, because the mean of its divisors is an integer number (265904044).

Almost surely, 2^531808087 is an apocalyptic number.

531808087 is a deficient number, since it is larger than the sum of its proper divisors (1).

531808087 is an equidigital number, since it uses as much as digits as its factorization.

531808087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53760, while the sum is 40.

The square root of 531808087 is about 23060.9645721943. The cubic root of 531808087 is about 810.1864565930.

The spelling of 531808087 in words is "five hundred thirty-one million, eight hundred eight thousand, eighty-seven".