587423981 has 2 divisors, whose sum is σ = 587423982. Its totient is φ = 587423980.

The previous prime is 587423957. The next prime is 587423983. The reversal of 587423981 is 189324785.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 552720100 + 34703881 = 23510^2 + 5891^2 .

It is a cyclic number.

It is not a de Polignac number, because 587423981 - 2⁶ = 587423917 is a prime.

It is a super-2 number, since 2×587423981² = 690133866907776722, which contains 22 as substring.

Together with 587423983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (587423983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 293711990 + 293711991.

It is an arithmetic number, because the mean of its divisors is an integer number (293711991).

Almost surely, 2^587423981 is an apocalyptic number.

It is an amenable number.

587423981 is a deficient number, since it is larger than the sum of its proper divisors (1).

587423981 is an equidigital number, since it uses as much as digits as its factorization.

587423981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 47.

The square root of 587423981 is about 24236.8310841166. The cubic root of 587423981 is about 837.4982162582.

The spelling of 587423981 in words is "five hundred eighty-seven million, four hundred twenty-three thousand, nine hundred eighty-one".