65915287 has 4 divisors (see below), whose sum is σ = 65975416. Its totient is φ = 65855160.

The previous prime is 65915279. The next prime is 65915293. The reversal of 65915287 is 78251956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65915287 - 2³ = 65915279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65915387) 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 in 3 ways as a sum of consecutive naturals, for example, 28389 + ... + 30622.

It is an arithmetic number, because the mean of its divisors is an integer number (16493854).

Almost surely, 2^65915287 is an apocalyptic number.

65915287 is a deficient number, since it is larger than the sum of its proper divisors (60129).

65915287 is a wasteful number, since it uses less digits than its factorization.

65915287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60128.

The product of its digits is 151200, while the sum is 43.

The square root of 65915287 is about 8118.8230058303. The cubic root of 65915287 is about 403.9510262336.

The spelling of 65915287 in words is "sixty-five million, nine hundred fifteen thousand, two hundred eighty-seven".