65890087 has 2 divisors, whose sum is σ = 65890088. Its totient is φ = 65890086.

The previous prime is 65890073. The next prime is 65890109. The reversal of 65890087 is 78009856.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65890087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65890057) 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, 32945043 + 32945044.

It is an arithmetic number, because the mean of its divisors is an integer number (32945044).

Almost surely, 2^65890087 is an apocalyptic number.

65890087 is a deficient number, since it is larger than the sum of its proper divisors (1).

65890087 is an equidigital number, since it uses as much as digits as its factorization.

65890087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The square root of 65890087 is about 8117.2709083780. The cubic root of 65890087 is about 403.8995416496.

The spelling of 65890087 in words is "sixty-five million, eight hundred ninety thousand, eighty-seven".