65987123 has 2 divisors, whose sum is σ = 65987124. Its totient is φ = 65987122.

The previous prime is 65987111. The next prime is 65987137. The reversal of 65987123 is 32178956.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 65987123 - 2¹⁰ = 65986099 is a prime.

It is not a weakly prime, because it can be changed into another prime (65987143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32993561 + 32993562.

It is an arithmetic number, because the mean of its divisors is an integer number (32993562).

Almost surely, 2^65987123 is an apocalyptic number.

65987123 is a deficient number, since it is larger than the sum of its proper divisors (1).

65987123 is an equidigital number, since it uses as much as digits as its factorization.

65987123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The square root of 65987123 is about 8123.2458414109. The cubic root of 65987123 is about 404.0977180054.

The spelling of 65987123 in words is "sixty-five million, nine hundred eighty-seven thousand, one hundred twenty-three".