87750539 has 2 divisors, whose sum is σ = 87750540. Its totient is φ = 87750538.

The previous prime is 87750499. The next prime is 87750547. The reversal of 87750539 is 93505778.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87750539 - 2¹² = 87746443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87750539.

It is not a weakly prime, because it can be changed into another prime (87750239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43875269 + 43875270.

It is an arithmetic number, because the mean of its divisors is an integer number (43875270).

Almost surely, 2^87750539 is an apocalyptic number.

87750539 is a deficient number, since it is larger than the sum of its proper divisors (1).

87750539 is an equidigital number, since it uses as much as digits as its factorization.

87750539 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 87750539 is about 9367.5257672451. The cubic root of 87750539 is about 444.3753201085.

The spelling of 87750539 in words is "eighty-seven million, seven hundred fifty thousand, five hundred thirty-nine".