65438647 has 8 divisors (see below), whose sum is σ = 67072896. Its totient is φ = 63809592.

The previous prime is 65438629. The next prime is 65438651. The reversal of 65438647 is 74683456.

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

It is not a de Polignac number, because 65438647 - 2¹⁹ = 64914359 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65438687) 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, 39918 + ... + 41524.

It is an arithmetic number, because the mean of its divisors is an integer number (8384112).

Almost surely, 2^65438647 is an apocalyptic number.

65438647 is a deficient number, since it is larger than the sum of its proper divisors (1634249).

65438647 is a wasteful number, since it uses less digits than its factorization.

65438647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2597.

The product of its digits is 483840, while the sum is 43.

The square root of 65438647 is about 8089.4157391001. The cubic root of 65438647 is about 402.9749998345.

The spelling of 65438647 in words is "sixty-five million, four hundred thirty-eight thousand, six hundred forty-seven".