65311387 has 4 divisors (see below), whose sum is σ = 65328120. Its totient is φ = 65294656.

The previous prime is 65311369. The next prime is 65311391. The reversal of 65311387 is 78311356.

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 65311387 - 2²³ = 56922779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65311307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 939 + ... + 11467.

It is an arithmetic number, because the mean of its divisors is an integer number (16332030).

Almost surely, 2^65311387 is an apocalyptic number.

65311387 is a deficient number, since it is larger than the sum of its proper divisors (16733).

65311387 is a wasteful number, since it uses less digits than its factorization.

65311387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16732.

The product of its digits is 15120, while the sum is 34.

The square root of 65311387 is about 8081.5460773295. The cubic root of 65311387 is about 402.7136054839.

The spelling of 65311387 in words is "sixty-five million, three hundred eleven thousand, three hundred eighty-seven".