64947841 has 4 divisors (see below), whose sum is σ = 74226112. Its totient is φ = 55669572.

The previous prime is 64947797. The next prime is 64947847. The reversal of 64947841 is 14874946.

64947841 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 64947841 - 2⁷ = 64947713 is a prime.

It is a super-2 number, since 2×64947841² = 8436444101122562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64947847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4639125 + ... + 4639138.

It is an arithmetic number, because the mean of its divisors is an integer number (18556528).

Almost surely, 2^64947841 is an apocalyptic number.

It is an amenable number.

64947841 is a deficient number, since it is larger than the sum of its proper divisors (9278271).

64947841 is an equidigital number, since it uses as much as digits as its factorization.

64947841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9278270.

The product of its digits is 193536, while the sum is 43.

The square root of 64947841 is about 8059.0223352464. The cubic root of 64947841 is about 401.9649998818.

The spelling of 64947841 in words is "sixty-four million, nine hundred forty-seven thousand, eight hundred forty-one".