65147987 has 4 divisors (see below), whose sum is σ = 65202480. Its totient is φ = 65093496.

The previous prime is 65147963. The next prime is 65147989. The reversal of 65147987 is 78974156.

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 65147987 - 2⁶ = 65147923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65147989) 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, 25412 + ... + 27857.

It is an arithmetic number, because the mean of its divisors is an integer number (16300620).

Almost surely, 2^65147987 is an apocalyptic number.

65147987 is a deficient number, since it is larger than the sum of its proper divisors (54493).

65147987 is a wasteful number, since it uses less digits than its factorization.

65147987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54492.

The product of its digits is 423360, while the sum is 47.

The square root of 65147987 is about 8071.4302945637. The cubic root of 65147987 is about 402.3774805520.

The spelling of 65147987 in words is "sixty-five million, one hundred forty-seven thousand, nine hundred eighty-seven".