65523987 has 24 divisors (see below), whose sum is σ = 101956608. Its totient is φ = 40431600.

The previous prime is 65523977. The next prime is 65524007. The reversal of 65523987 is 78932556.

It is a happy number.

65523987 is a `hidden beast` number, since 6 + 552 + 3 + 98 + 7 = 666.

It is not a de Polignac number, because 65523987 - 2⁴ = 65523971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (65523907) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1312 + ... + 11522.

It is an arithmetic number, because the mean of its divisors is an integer number (4248192).

Almost surely, 2^65523987 is an apocalyptic number.

65523987 is a deficient number, since it is larger than the sum of its proper divisors (36432621).

65523987 is a wasteful number, since it uses less digits than its factorization.

65523987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10271 (or 10268 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 65523987 is about 8094.6888142782. The cubic root of 65523987 is about 403.1500999695.

It can be divided in two parts, 655 and 23987, that added together give a palindrome (24642).

The spelling of 65523987 in words is "sixty-five million, five hundred twenty-three thousand, nine hundred eighty-seven".