65017987 has 8 divisors (see below), whose sum is σ = 67942656. Its totient is φ = 62101512.

The previous prime is 65017969. The next prime is 65017993. The reversal of 65017987 is 78971056.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65017987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65017187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18808 + ... + 21994.

It is an arithmetic number, because the mean of its divisors is an integer number (8492832).

Almost surely, 2^65017987 is an apocalyptic number.

65017987 is a deficient number, since it is larger than the sum of its proper divisors (2924669).

65017987 is a wasteful number, since it uses less digits than its factorization.

65017987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097.

The product of its (nonzero) digits is 105840, while the sum is 43.

The square root of 65017987 is about 8063.3731775232. The cubic root of 65017987 is about 402.1096600252.

The spelling of 65017987 in words is "sixty-five million, seventeen thousand, nine hundred eighty-seven".