87111623 has 2 divisors, whose sum is σ = 87111624. Its totient is φ = 87111622.

The previous prime is 87111617. The next prime is 87111659. The reversal of 87111623 is 32611178.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87111623 - 2¹⁸ = 86849479 is a prime.

It is equal to p_5059307 and since 87111623 and 5059307 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87111613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43555811 + 43555812.

It is an arithmetic number, because the mean of its divisors is an integer number (43555812).

Almost surely, 2^87111623 is an apocalyptic number.

87111623 is a deficient number, since it is larger than the sum of its proper divisors (1).

87111623 is an equidigital number, since it uses as much as digits as its factorization.

87111623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 29.

The square root of 87111623 is about 9333.3607559121. The cubic root of 87111623 is about 443.2941857129.

The spelling of 87111623 in words is "eighty-seven million, one hundred eleven thousand, six hundred twenty-three".