87389111 has 2 divisors, whose sum is σ = 87389112. Its totient is φ = 87389110.

The previous prime is 87389101. The next prime is 87389171. The reversal of 87389111 is 11198378.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87389111 - 2²² = 83194807 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87389101) 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, 43694555 + 43694556.

It is an arithmetic number, because the mean of its divisors is an integer number (43694556).

Almost surely, 2^87389111 is an apocalyptic number.

87389111 is a deficient number, since it is larger than the sum of its proper divisors (1).

87389111 is an equidigital number, since it uses as much as digits as its factorization.

87389111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12096, while the sum is 38.

The square root of 87389111 is about 9348.2143214627. The cubic root of 87389111 is about 443.7643810455.

The spelling of 87389111 in words is "eighty-seven million, three hundred eighty-nine thousand, one hundred eleven".