87765043 has 2 divisors, whose sum is σ = 87765044. Its totient is φ = 87765042.

The previous prime is 87765019. The next prime is 87765071. The reversal of 87765043 is 34056778.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87765043 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87764987 and 87765005.

It is not a weakly prime, because it can be changed into another prime (87765143) 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, 43882521 + 43882522.

It is an arithmetic number, because the mean of its divisors is an integer number (43882522).

Almost surely, 2^87765043 is an apocalyptic number.

87765043 is a deficient number, since it is larger than the sum of its proper divisors (1).

87765043 is an equidigital number, since it uses as much as digits as its factorization.

87765043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 87765043 is about 9368.2998991279. The cubic root of 87765043 is about 444.3998018748.

The spelling of 87765043 in words is "eighty-seven million, seven hundred sixty-five thousand, forty-three".