87040111 has 2 divisors, whose sum is σ = 87040112. Its totient is φ = 87040110.

The previous prime is 87040103. The next prime is 87040117. The reversal of 87040111 is 11104078.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87040111 - 2³ = 87040103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87040117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43520055 + 43520056.

It is an arithmetic number, because the mean of its divisors is an integer number (43520056).

Almost surely, 2^87040111 is an apocalyptic number.

87040111 is a deficient number, since it is larger than the sum of its proper divisors (1).

87040111 is an equidigital number, since it uses as much as digits as its factorization.

87040111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 87040111 is about 9329.5289806078. The cubic root of 87040111 is about 443.1728489294.

Adding to 87040111 its reverse (11104078), we get a palindrome (98144189).

The spelling of 87040111 in words is "eighty-seven million, forty thousand, one hundred eleven".