87573839 has 2 divisors, whose sum is σ = 87573840. Its totient is φ = 87573838.

The previous prime is 87573779. The next prime is 87573841. The reversal of 87573839 is 93837578.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87573839 - 2⁸ = 87573583 is a prime.

Together with 87573841, 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 (87573859) 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, 43786919 + 43786920.

It is an arithmetic number, because the mean of its divisors is an integer number (43786920).

Almost surely, 2^87573839 is an apocalyptic number.

87573839 is a deficient number, since it is larger than the sum of its proper divisors (1).

87573839 is an equidigital number, since it uses as much as digits as its factorization.

87573839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 87573839 is about 9358.0894951908. The cubic root of 87573839 is about 444.0768456527.

The spelling of 87573839 in words is "eighty-seven million, five hundred seventy-three thousand, eight hundred thirty-nine".